<p style="text-align:justify"><img alt="" src="https://edupmquestionhelp.s3.ap-south-1.amazonaws.com/hint/uploads/images/16255624931625562493.jpg" style="height:421px; width:800px" /></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px"><strong><u>Example 4:</u></strong> Figure 7.28 shows a single line diagram of a portion of a power system network. Bracketed figures near the bus give the fault levels for a triple line fault on the concerned bus. Relays used are IDMT overcurrent and earth-fault relays rated for 1 amp with a setting range as follows:</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Overcurrent Phase Units: 50 &ndash; 200 % of 1 amp in 7 equal steps.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Overcurrent Earth-fault Units: 10-40 % of 1 amp in 7 equal steps.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Both phase and ground units at relaying point R<sub>7</sub> are set for TMS = 0.25. Relays R<sub>1</sub>, R<sub>2</sub>, R<sub>3</sub> and R<sub>4</sub> are voltage-controlled overcurrent relays such that their plug-setting reduces to 40 % of the set value if voltage reduces below 70 % of rated voltage. The excitation currents of all CTs are 0.03 amp. The magnitudes of earth-fault currents at different buses are as follows:</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Bus A: 5014 amp.</span></p>

<p style="text-align:justify"><span style="font-size:14px">Bus B: 3288 amp.</span></p>

<p style="text-align:justify"><span style="font-size:14px">Bus C: 4445 amp.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Assuming suitable discrimination time margin, determine the plug-settings and time settings of all phase and ground relays shown in figure.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px"><strong><u>Solution:</u></strong> It can be observed that Relays R<sub>5</sub> and R<sub>6</sub> are directional overcurrent relays and other relays are non-directional overcurrent relays. Now, plug-settings are to be calculated first.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px"><strong><u>Plug-Settings of Phase Relays:</u></strong> Plug-setting of R<sub>7</sub> will be decided based on the rated primary current of 100 MVA transformer.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">P.S. of R<sub>7&nbsp;</sub></span></p>

<p style="text-align:justify"><span style="font-size:14px"><span class="math-tex">\(=\frac{100\times10^3\times 100}{\sqrt3\times132\times 500}\)</span></span></p>

<p style="text-align:justify"><span style="font-size:14px">= 87.47 %. </span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">hence,100% shall be set.&nbsp;It can be appreciated that R<sub>3</sub>/R<sub>4</sub> will back-up relay R<sub>7</sub>. P. S. of R<sub>3</sub>/R<sub>4</sub> for grading with the relay R<sub>7</sub> will be 75 % ( <span class="math-tex">\(\frac{1.3}{1.05}\)</span>&nbsp;principle).&nbsp;). The full load current per feeder is&nbsp;<span class="math-tex">\(\frac{150\times 10^3}{\sqrt3\times 132}\)</span>&nbsp;= 656 amp.Hence, it seems that 75 % is the correct setting for relay R<sub>3</sub>/R<sub>4</sub>. But this is not so, as, when one of the feeder trips due to fault in that feeder (one line contingency), the other feeder will be loaded with double the current calculated above. Because the plug-setting is 750 amp (primary) and the load current is 1312 amp (2&times;&nbsp;656), the other feeder will also trip which is not as per requirement of protective relaying as tripping of healthy feeder is undesirable. Hence, based on single line contingency, the plug-setting of the relay R<sub>3</sub>/R<sub>4</sub> shall be set as&nbsp;<span class="math-tex">\(\frac{1312\times100}{1000}\)</span>&nbsp;or&nbsp;131.2 %, i.e., 150 % is selected. Now, as R<sub>3</sub> backs up R<sub>6</sub> and R<sub>4</sub> backs up R<sub>5</sub>,</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">P.S. of R<sub>3&nbsp;</sub>or R<sub>4&nbsp;</sub></span></p>

<p style="text-align:justify"><span style="font-size:14px">&gt;&nbsp;<span class="math-tex">\(\frac{1.3}{1.05}\)</span>&nbsp;&times;&nbsp;P.S. of R<sub>6&nbsp;</sub>or R<sub>5&nbsp;</sub></span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px"><span class="math-tex">\(\dot{.\hspace{0.095in}.}\)</span>&nbsp;&nbsp;P.S. of R<sub>5&nbsp;&nbsp;</sub>(or R<sub>6</sub> ) &nbsp;&nbsp;</span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &lt;&nbsp;<span class="math-tex">\(\frac{1.05}{1.3}\)</span>&nbsp;&times; P.S. of R<sub>3&nbsp;</sub>(or R<sub>4 </sub>)</span></p>

<p style="text-align:justify"><span style="font-size:14px">&lt;&nbsp;<span class="math-tex">\(\frac{1.05}{1.3}\)</span>&nbsp;&times; 1500</span></p>

<p style="text-align:justify"><span style="font-size:14px">&lt; 1211.153 amp or 121.15% CT rating.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Hence, 100 % is selected.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">On the similar considerations </span></p>

<p style="text-align:justify"><span style="font-size:14px">(<span class="math-tex">\(\frac{1.3}{1.05}\)</span>&nbsp;principle),</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">P. S. of R<sub>1</sub>/R<sub>2</sub> shall be set at 200 %.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px"><strong><u>Plug-Settings of Ground Relays:</u></strong></span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">P. S. of ground relay R<sub>7</sub> = 10 % (minimum available) = 0.1 amp (secondary).</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Adding excitation current requirements, CT secondary current = 0.19 amp (0.1 + 3 times 0.03).</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">P. S. of R<sub>7</sub> in CT primary terms = 95 amp.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">P. S. of ground relay R<sub>3</sub>/R<sub>4&nbsp;</sub>=<span class="math-tex">\(\frac{1.3}{1.05}\)</span>&nbsp;&times; 95 -117.62 amp.&nbsp;Secondary equivalent of this current &nbsp;is&nbsp;<span class="math-tex">\(\frac{117.62}{1000}\)</span>&nbsp;or 0.1176 amp. Hence, current being injected in ground relay R<sub>3</sub>/R<sub>4</sub> = 0.1176 &ndash; 0.09 = 0.027 amp or&nbsp;2.76 % of 1 amp. Hence, P. S. can be set (for R<sub>3</sub>/R<sub>4</sub>) at 10 %. But, as R<sub>3</sub> backs up R<sub>6,</sub> R<sub>6</sub> will be required to be set a step downwards with reference to relay R<sub>3</sub>. Therefore, ground relays R<sub>3</sub>/R<sub>4</sub> will be set at&nbsp;P. S. equal to 15 % and ground relays R<sub>5</sub>/R<sub>6</sub> will be set at plug-setting equal to 10 %. On similar line of calculations, P. S. of ground relays R<sub>1</sub>/R<sub>2</sub> is required to be set at 25 %.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px"><strong><u>Time settings of Phase Overcurrent relays:</u></strong></span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">While deciding the time setting, worst consideration is highest fault current. The fault current will be maximum when both the feeders are in circuit. Hence, in following calculations, we will consider both the feeders in circuit.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">R<sub>3</sub>-R<sub>7</sub> coordination: Fault MVA = 700 MVA.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Therefore, PSM of R<sub>7&nbsp;</sub><span class="math-tex">\(= \frac{700\times 10^3}{\sqrt3\times132\times500}\)</span></span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 6.12.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px"><span class="math-tex">\(\dot{.\hspace{0.095in}.}\)</span>&nbsp;Top of R<sub>7&nbsp;</sub><span class="math-tex">\(=\frac{3}{log_{10}6.12}\)</span>&nbsp;&times; 0.25</span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 0.9532 sec.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Therefore, Top of R<sub>3&nbsp;</sub>= 0.9532 + 0.25 </span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 1.203 sec. </span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">PSM of R<sub>3</sub> =&nbsp;<span class="math-tex">\(\frac{700\times10^3}{\sqrt3\times 132\times 2\times 1500\times 0.4}\)</span>&nbsp;</span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 2.55.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">This is because fault current is divided into two equal paths and relay R<sub>3</sub> is a voltage-controlled overcurrent relay, the plug-setting of which is reduced to 40 % of set value (150 % or 1500 amp) during fault condition.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px"><span class="math-tex">\(\dot{.\hspace{0.095in}.}\)</span>&nbsp;TMS&nbsp;of R<sub>3&nbsp;</sub><span class="math-tex">\(=\frac{1.203\times log_{10}2.55}{3}\)</span></span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 0.1631.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Hence TMS (R<sub>3</sub>) shall be set at 0.2. same will be the TMS of&nbsp;R<sub>4&nbsp;</sub></span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">R<sub>3</sub>-R<sub>6</sub> coordination: Fault current will be same. </span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Top of R<sub>3&nbsp;</sub><span class="math-tex">\(=\frac{3}{log_{10}2.55}\)</span>&nbsp;&times; 0.2&nbsp;</span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 1.475 sec.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Hence, Top of R<sub>6</sub> = 1.475 &ndash; 0.25 =1.226 sec. </span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">PSM of R<sub>6&nbsp;</sub><span class="math-tex">\(=\frac{700\times10^3}{\sqrt3\times 132\times 2\times 1000}\)</span></span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 1.53.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px"><span class="math-tex">\(\dot{.\hspace{0.095in}.}\)</span>&nbsp; TMS of R<sub>6&nbsp;</sub><span class="math-tex">\(= \frac{1.226\times log_{10}1.53}{3}\)</span></span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 0.075.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Hence, TMS(R<sub>6</sub>) shall be set at 0.05. same will be the TMS of&nbsp;R<sub>5&nbsp;</sub>.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">R<sub>1</sub>-R<sub>3</sub> coordination: Fault MVA =1000 MVA.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">PSM of R<sub>3</sub> = 7.29. </span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Therefore, Top of R<sub>3</sub> = 0.6954 sec.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px"><span class="math-tex">\(\dot{.\hspace{0.095in}.}\)</span>&nbsp;Top of&nbsp;R<sub>1&nbsp;</sub></span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; = 0.9454 sec.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">PSM of R<sub>1</sub> = 2.73. Hence, TMS of R<sub>1</sub> (and R<sub>2</sub> also) = 0.1374. Hence 0.15 selected.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px"><strong><u>Time Settings of Ground Overcurrent Relays:</u></strong></span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">R<sub>3</sub>-R<sub>7</sub> coordination: Fault current =3288 amp. Secondary equivalent, </span></p>

<p style="text-align:justify"><span style="font-size:14px"><span class="math-tex">\(i_f= \frac{3288}{500}\)</span></span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp;= 6.576 amp.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Current through the ground relay = 6.486 amp. </span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Therefore, PSM of R<sub>7&nbsp;</sub></span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<span class="math-tex">\(=\frac{6.486}{0.1}\)</span></span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 64.86.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px"><span class="math-tex">\(\dot{.\hspace{0.095in}.}\)</span>&nbsp;Top of&nbsp;R<sub>7&nbsp;</sub><span class="math-tex">\(=\frac{3}{log_{10}20}\)</span>&nbsp;&times; 0.25.</span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 0.5764 sec.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px"><span class="math-tex">\(\dot{.\hspace{0.095in}.}\)</span>&nbsp;Top of&nbsp;R<sub>3&nbsp;&nbsp;</sub>= 0.8264 sec.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Secondary fault current through CT secondary of relaying point R<sub>3</sub> = 1.644 amp. </span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Current through the ground relay R<sub>3</sub> = 1.554 amp. PSM of R<sub>3</sub> = 10.36.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Therefore, TMS of R<sub>3&nbsp;</sub></span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span class="math-tex">\(= \frac{0.8264\times log_{10}10.36}{3}\)</span>&nbsp;&nbsp;</span></p>

<p style="text-align:justify"><span style="font-size:14px">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 0.2796. Hence, TMS (R<sub>3</sub>) is to be at 0.3.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Top of R<sub>3</sub> = 0.8863 sec. Hence, Top of R<sub>6</sub> = 0.6363 sec. PSM of R<sub>6</sub> = 15.54.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Therefore, TMS of R<sub>6</sub> = 0.2527. Hence 0.25 selected. Similarly, TMS of R<sub>1</sub>/R<sub>2</sub> = 0.3092.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify"><span style="font-size:14px">Therefore, TMS is selected as 0.35.</span></p>

<p style="text-align:justify">&nbsp;</p>

<p style="text-align:justify">&nbsp;</p>

<table cellspacing="0" class="MsoTableGrid" style="border-collapse:collapse; border:none; width:900px">
	<caption>
	<p><strong><span style="font-size:18px">Table 7.10: Summary of Settings of Relays of Example 4</span></strong></p>
	</caption>
	<tbody>
		<tr>
			<td style="border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:1px solid black; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">Relay</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:1px solid black; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">P. S. of Phase Relay in</span></div>

			<div style="text-align:center"><span style="font-size:28px">&nbsp;% of 1 amp</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:1px solid black; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">TMS of Phase Relay</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:1px solid black; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">P. S. of Ground Relay in</span></div>

			<div style="text-align:center"><span style="font-size:28px">% of 1 amp</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:1px solid black; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">TMS of Ground Relay</span></div>
			</td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">R<sub>1</sub></span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">200</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">0.15</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">25</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">0.35</span></div>
			</td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">R<sub>2</sub></span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">200</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">0.15</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">25</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">0.35</span></div>
			</td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">R<sub>3</sub></span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">150</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">0.2</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">15</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">0.3</span></div>
			</td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">R<sub>4</sub></span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">150</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">0.2</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">15</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">0.3</span></div>
			</td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">R<sub>5</sub></span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">100</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">0.05</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">10</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">0.25</span></div>
			</td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">R<sub>6</sub></span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">100</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">0.05</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">10</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">0.25</span></div>
			</td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">R<sub>7</sub></span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">100</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">0.25</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">10</span></div>
			</td>
			<td style="border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:120px">
			<div style="text-align:center"><span style="font-size:28px">0.25</span></div>
			</td>
		</tr>
	</tbody>
</table>

<p style="text-align:justify">&nbsp;</p>