Reverse Rotation Stop Relay APR-S
Uses voltage detection to determine reverse revolution of three-phase motors.
[Features]
· A relay which prevents reverse motor operations caused by mis-wiring.
· The direction of motor revolution is detected as soon as power is applied to the relay. If the power is reversed, the magnetic contactor locks in the open state.
· The magnetic contactor can also be wired to protect it from being closed in open phase.
· A small, plug-in relay that needs no adjustment.
· Uses the voltage detection method so that it can be operated independently of the load current.
[Applications]
· For integrating into equipment for which reverse operation caused by faulty wiring could lead to an accident.
· For equipment which needs to be frequently rewired.
Reverse Protection Relay APR-S Specifications
Reverse Protection Relay APR-S external appearance
APR-S outline drawing
APR-S dimensional outline drawing, Units: mm
APR-S terminal layout drawing
(Drawing viewed from back of main body)
APR-S380, APR-S440 outline drawing
APR-S380, APR-S440 dimensional outline drawing, Units: mm
APR-S380, APR-S440 terminal layout drawing
(Drawing viewed from back of main body)
APR-S external connection example
Operation description
When power lines R → S → T are energized to apply current in sequence to terminals (6) → (4) → (3) there is a positive phase sequence.
Positive phase sequence: built-in relay operation ((5)-(1) carrying current, (5)-(8) not carrying current).
Negative phase sequence: no built-in relay operation ((5)-(1) not carrying current, (5)-(8) carrying current).
APR-S380/S440 external connection example
- *For applied voltages and control voltages to contacts use a separate power supply.
Operation description
When power lines R → S → T are energized to apply current in sequence to terminals (10) → (1) → (3) there is a positive phase sequence.
Positive phase sequence: built-in relay operation ((6)-(7) carrying current, (6)-(8) not carrying current).
Negative phase sequence: no built-in relay operation ((6)-(7) not carrying current, (6)-(8) carrying current).
APR-S dimensions with sockets mounted, Units: mm
Model PF083A (sold separately)
| Rated Voltage | Model APR-S | 200/220 V |
|---|---|---|
| Model APR-S380 | 380/400 V | |
| Model APR-S440 | 440 V | |
| Allowable Voltage Fluctuation Range | Model APR-S | Three-phase 170 to 240 V AC 50/60 Hz |
| Model APR-S380 | Three-phase 350 to 420 V AC 50/60 Hz | |
| Model APR-S440 | Three-phase 410 to 460 V AC 50/60 Hz | |
| Operating Time | Within 100 ms (After voltage applied, until positive phase → reverse phase detected) | |
| Control Output | Model APR-S | 1 c relay output 200 V AC 1.1 A cosφ = 1, 200 V AC 0.6 A cosφ = 0.4 |
| Model APR-S380 | 1 c relay output 250 V AC 1.1 A cosφ = 1, 250 V AC 0.6 A cosφ = 0.4 | |
| Model APR-S440 | ||
| Ambient Operating Temperature | -10 to +50°C (assuming no icing) | |
| Lifespan | Mechanical | 1,000,000 operations min. |
| Electrical | 100,000 operations min. | |
| Weight | Approx. 100 g | |
- *See the catalog for specifications other than those detailed above.