WL Circuit Breaker
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WL Selection and Application Guide • 2005
Technical Data for Current Transformers
3-Phase Metering CTs, Guide Frame Mounted
Frame Size I & II
3-Phase Metering CTs, Guide Frame Mounted
Frame Size III
ANSI Metering @ 60 Hz
Catalog Number Current Ratio
B-0.1 B-0.2 B-0.5 B-0.9 B-1.8
Relay Accuracy
WLG1005MCT3 100:5 1.2 – – – – C5 0.011 12
WLG1505MCT3 150:5 1.2 – – – – C7 0.019 16
WLG2005MCT3 200:5 1.2 – – – – C9 0.030 18
WLG2505MCT3 250:5 1.2 – – – – C12 0.038 22
WLG3005MCT3 300:5 0.6 0.6 – – – C15 0.045 28
WLG4005MCT3 400:5 0.6 0.6 1.2 – – C20 0.060 36
WLG5005MCT3 500:5 0.6 0.6 1.2 – – C25 0.075 46
WLG6005MCT3 600:5 0.3 0.3 0.6 1.2 1.2 C21 0.178 28
WLG8005MCT3 800:5 0.3 0.3 0.6 0.6 1.2 C29 0.237 36
WLG10005MCT3 1000:5 0.3 0.3 0.6 0.6 1.2 C35 0.296 46
WLG12005MCT3 1200:5 0.3 0.3 0.3 0.6 0.6 C20 0.241 70
WLG15005MCT3 1500:5 0.3 0.3 0.3 0.3 0.6 C25 0.301 88
WLG16005MCT3 1600:5 0.3 0.3 0.3 0.3 0.6 C27 0.321 94
WLG20005MCT3 2000:5 0.3 0.3 0.3 0.3 0.3 C34 0.402 100
WLG25005MCT3 2500:5 0.3 0.3 0.3 0.3 0.3 C20 0.468 100
WLG30005MCT3 3000:5 0.3 0.3 0.3 0.3 0.3 C21 0.524 100
WLG32005MCT3 3200:5 0.3 0.3 0.3 0.3 0.3 C20 0.560 100
Frequency: 50 - 400 Hz
Insulation Level:
0.6 kV; BIL 10 kV full wave
Insulation System:
Cast in polyurethane resin, red or black,
Temperature Class 130º C
Continuous Thermal Current Rating Factor:
1.33 @ 30º C ambient; 1.00 @ 55º C ambient
Thermal Short-time Rating: (see table)
Regulatory Agency Approvals:
UL & CUL
Flexible Leads:
UL 1015, CSA approved, #16 AWG, 36" long
(minimum), with wire markers
Approximate Weight: 20 lbs.
Tolerance on Dimension
(unless otherwise noted):
0.06 for dimension under 6"
0.09 for dimension between 6" & 18"
Notes:
For external metering.
Up to 2 CTs per guide frame
(one load side, one line side)
Mounts inside the guide frame.
Catalog Number Current Ratio Metering Accuracy Relay Accuracy
WLG20005MCT3 2000:5 0.3 B1.8 C20 0.27 188
WLG25005MCT3 2500:5 0.3 B1.8 C20 0.34 236
WLG30005MCT3 3000:5 0.3 B1.8 C20 0.62 178
WLG32005MCT3 3200:5 0.3 B1.8 C20 0.67 190
WLG40005MCT3 4000:5 0.3 B1.8 C20 0.84 237
WLG50005MCT3 5000:5 0.3 B1.8 C20 1.05 297
Frequency: 50 - 400 Hz
Insulation Level:
0.6 kV; BIL 10 kV full wave
Insulation System:
Cast in polyurethane resin, red or black,
Temperature Class 130º C
Continuous Thermal Current Rating Factor:
1.33 @ 30º C ambient; 1.00 @ 55º C ambient
Regulatory Agency Approval:
UL and CUL
Flexible Leads:
UL 1015, CSA approved, #16 AWG, 36" long
(minimum), with wire markers
Approximate Weight: 33 lbs.
Tolerance on Dimension
(unless otherwise noted):
0.06 for dimension under 6"
0.09 for dimension between 6" & 18"
0.125 for dimension over 18"
Notes:
For external metering.
Up to 2 CTs per guide frame
(one load side, one line side)
Mounts inside the guide frame.
Secondary Winding
Resistance
(ohms @ 75
º
C
Thermal
S/T
kA - 1 sec
Secondary Winding
Resistance
(ohms @ 75
º
C
Thermal
S/T
kA - 1 sec
+
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+
-
+
-
+
-
+
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WL_SA_intro-sec1.qxd 2/7/05 1:56 PM Page 57
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