RST25 Electronic Voltage Relay
PHASE FAILURE, PHASE SEQUENCE, ASYMMETRIC,
UNDERVOLTAGE AND OVERVOLTAGE RELAY
Operation Instructions
The electronic phase relay RST 25 offers phase, philure shift, phase flashing, asymmetric, Phase sequence and Also under and overvoltage control.
Connection
The RST 25 can be connected as following in the installation diagram:
FIG1: Connection of the relay before operation.
When the relay is connected as in FIG 1, the there yellow LED' SL1, L2 and L3 light up when The power supply A1 phase L, the A2 Neutral, and the three phases "L1", "L2"and "L3"are Connected.
If there is no under or overvoltage, phase failure or phase sequence, the green LED lights up, (terminals 11 and 14 are closed )and the relay is ready for self retaining.
It is also possible to connect the power supply after operation in FIG2.
By both FIG' s 1 and 2, the terminal "PE" must be grounded.
Undervoltage
The desired undervoltage limit can be adjusted down to-25% UN.
Asymmetry
The adjusting over-and undervoltage limit, the asymmetric limit is slso adjusted.
Time Delay
The switch off time can be adjusted by the potentiometer "Time Delay" from 0.1^^5 seconds. With this Function it is possible to adjust the time for the identification of the failure.
Contactor Control
If a phase fails during operation at load or one of the contacts of the contactor or circuit Breaker is Defective, (contact bounce or scorched contacts), RST 25 recognizes the failure, And also the feedback voltage, And switches off depending on the setting of "Time Delay". The RST 25 controls the phase shift. If there is a Phase failure the angle from the feedback Voltage is 30° . The RST 25 recognizes this failure.
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Technical Data |
3χ 400V, 40-60Hz |
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Mains voltage |
185… 250V AC(Optional when placing order) |
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Power Supply |
2VA |
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Power Consumption |
25° … 65° |
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Ambient Temperature |
120° ± 8° @UN=UU |
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Under voltage |
Adjustable to -25 percent UN |
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Overvoltage |
Adjustable to +25 percent UN |
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Tripping time |
0.1… 5 seconds |
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Life of the Instrument |
20χ 106 mechanical switchings |
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Air-gap and Leakage path |
Group C, 250V, VDE 0110 |
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Relay Output |
1 C/0 contact, 16A, 250V VDE, SEV, SEMKO, AgCdO |
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High-voltage test |
2500V |
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Shock voltage test |
5KV VDE0435 |
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Housing Type |
1P 40, DIN 40 050 |
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Weight |
325g |
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Dimension |
H=75mm, W=45mm, D=120mm |
Zhejiang Huayang Electric Co., Ltd. Specializes in manufacturing the Electronic overload Relays, Thermal Overload Relays, Electronic Voltage Relays, Other Protection & Monitoring Devices, Current Transformers, Shunt and any other electrical equipments. After several years' development, Vaya has become a larger enterprise combining research, production, sales and after-sales service of electronic relay and is one of the famous manufacturers in China. All of our production procedures are strictly followed ISO 9001. We also get across safety certification such as CE, CB, UL, CCC, etc. We are sure that we can offer you the product with good quality as well as competitive price as we have advanced technology and prefect testing equipments, with Up-To-Date machines and production.
Thanks to the perfect character, good service, and high quality, our products are well sold both in domestic and oversea markets, and highly praised by the clients. With the principle of quality, technology and credit, we insist on "Talents Is Our Base, Technique is the Source of Enterprise Development". And always continually research and develop new products to meet the clients' need. Look forward to establishing a long term business relationship with you!
