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Help CenterRST25 Electronic Voltage Relay
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Specifications
RST25 offers phase, phase shift, phase flashing, asymmetric, Phase sequence and Also under and overvoltage controlElectronic Over current Relay, Electronic Under Current Relay, Electronic DC Current Relay,Thermal Overload Relay
Electronic Voltage Relay, Electronic DC Voltage Relay, Protection & Monitoring Relay, Voltage Monitoring Relay
Operation Instructions:
The electronic phase relay RST 25 offers phase, phase 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 also 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.
Technical Data:
Mains voltage |
3×400V, 40-60Hz |
Power Supply |
185–250V AC(Optional when placing order) |
Power Consumption |
2VA |
Ambient Temperature |
25°C–65°C |
Phase Angle |
120°± 8°@UN=UU |
Under voltage |
Adjustable to -25% UN |
Overvoltage |
Adjustable to +25% UN |
Tripping time |
0.1—5 Seconds |
Life of the Instrument |
20×106 Mechanical switchings |
Air-gap and Leakage path |
Group C, 250V, VDE 0110 |
Relay Output |
1 C/O contact, 16A,250V VDE, SEV, SEMKO, AgCdO |
High-voltage test |
2500V |
Shock voltage test |
5KV VDE0435 |
Housing Type |
1P 40, DIN 40 050 |
Weight |
325g |
Dimension |
H=75mm, W=45mm, D=120mm |
Housing as per VDE0304, fixed by means of snap in lock on caprail(DIN 50022-35). Non-Inflammable, resistant to temperatures up to 150°c.
Air-gap and leak resistance according to VDE0100, DIN 57110, C500 VE/600 VG. Material of terminals
CuSN6 gold. Cross-section of connecting lead 2×2.5mm2. Protection against electrical shock, M4 screws.
Wiring Diagram:
Design box for customers
Packed with six belt/Strapping packing strip/belt/tape
Strong five layer cartons (3-layered carton)
Q 1. What's the payment term?
A. We accept T/T, L/C, Western Union, Cash
Q 2. What's the delivery time?
A. Usually it would take about 25 days for production
Q 3. What is the standard of package?
A. Export standard package or special package according to customer requirement
Q 4. What kind of product quality your factory offer?
A. We offer most competitive prices with best quality
Q 5. Do you accept OEM and ODM business?
A. We do,for OEM service please send us your authorization, also your quantity should large enough.
Q 6. Could you offer certificate of origin?
A. We can prepare relative documents to foreign affairs office or other office to apply the certificate.
Q7. What kind of certificate you have ?
A. Our company already achieve ISO, and for products, we have CE, SEMKO,CB, BSI, GS, TUV, VDE.
Your acceptance of the freight collect means the samples provided to you free.
Your order, our responsibility.
We will keeping improvement of technology in daily life, offer you excellent products, competitive prices, humanized service.
Send Inquiry to This Supplier
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