Reverse Power Relay
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Motoring protection |
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Reverse Power Relay RR 20 Reverse
Power Relay monitors
the power flow at the terminals of an ac-generator. The relay operates
when the real power flow in a given direction exceeds predetermined limits.
This Protects the machine against motoring due to loss of prime mover
torque. A time delay is incorporated to avoid tripping due to ransients
such as those encountered due to load rejection or during synchronization.
RR 20 also have power output signal for power indicator meter. |
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วิธีการติดตั้งและทดสอบ Reverse Power Relay |
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1)
ต่อวงจรตาม Diagram
ข้อควรระวังคือ สัญญาณจาก CT
จะต้องมาจาก CT
ที่วัดกระแสของ
Phase L1 และ Polarity
ของ CT ต้องต่อให้ถูกต้องตาม Diagram
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Specifications |
Input voltage |
3 phase, 380 VAC, 50/60 Hz |
Input current |
5 Aac. |
Reverse power |
Adjustable 0 – 20 % of input current |
On delay |
Adjustable 0 – 20 sec. |
Start delay |
Adjustable 0 – 15 sec. |
Output relay |
SPDT, 5 A, 250 Vac. |
Power indicator output |
0 – 10 Vdc. |
Ambient Temperature |
0 – 50 C |
Connection |
Plug –in 11 pins socket |
Mounting |
Wall or DIN rail |
Dimension |
W50 x H70 x D130 mm. |