SELEC 800VPR‑3 three‑phase voltage protection relay
Selec 800VPR-3 Voltage Protection Relay (3-Phase, 3-Wire, Under/Over Voltage Protection)
A compact DIN-rail-mounted 3-phase voltage protection relay designed to monitor under-voltage, over-voltage, phase failure, and phase sequence with adjustable trip delay.
The Selec 800VPR-3 is a 3-phase, 3-wire voltage protection relay designed to safeguard electrical systems from under-voltage, over-voltage, phase failure, and phase sequence issues. It features adjustable trip delay, LED indicators, and DIN-rail mounting for industrial panels.
Key Features
Monitors under-voltage, over-voltage, phase failure, and phase sequence
Self-powered from 415V AC (L-L) input
Adjustable trip delay: 0–10 seconds
Instant trip for phase loss & phase sequence faults
LED indication for Power ON and Relay ON
Wide operating voltage range: 310–520V AC (L-L)
DIN-rail mounting; compact 22.5 mm width
High accuracy: Voltage ±0.5% FS, Time ±5% FS
IP20 protection, suitable for control panels
Auto reset on fault removal
Technical Specifications
| Parameter | Specification |
|---|---|
| Input Type | 3Ø – 3 Wire |
| Under Voltage Trip | 310–405V AC (L-L) |
| Over Voltage Trip | 425–520V AC (L-L) |
| Phase Failure Detection | Yes |
| Phase Sequence Detection | Yes |
| Trip Delay (T) | 0–10 sec (UV/OV) |
| Power-On Delay | 400 ms |
| Relay Output | 1 C/O (SPDT), 5A @ 250V AC |
| Operating Voltage Range | 310–520V AC (L-L) |
| Nominal Supply Voltage | 415V AC (Self-powered) |
| Power Consumption | 22 VA max |
| Frequency | 50/60 Hz |
| Hysteresis (Voltage) | 2V |
| Operating Temperature | 0°C to 50°C |
| Protection Degree | IP20 |
| Dimensions | 22.5 × 78.4 × 106 mm |
| Mounting | DIN Rail |
| Weight | 100 g |
Applications
Industrial control panels
Pump & HVAC control
Generator protection systems
Motor protection circuits
Automation panels
Electrical distribution boards
What’s in the Box?
Selec 800VPR-3 Relay Unit
User Manual / Datasheet
Warranty Card (if applicable)
FAQ
Q1: Does the 800VPR-3 work on single-phase?
A: No, it is designed for 3-phase, 3-wire systems only.
Q2: Is the relay self-powered?
A: Yes, it takes power directly from the 415V AC (L-L) input.
Q3: Can the trip delay be adjusted?
A: Yes, from 0 to 10 seconds for under/over voltage.
Q4: Does it detect phase reversal?
A: Yes, phase sequence monitoring is included.
Q5: What type of relay output is provided?
A: One SPDT relay rated at 5A, 250V AC.