Schneider Electric VigiPacT RHM Protection or Monitoring Relay
Installation Manual
Safety Instructions
PLEASE NOTE: Electrical equipment should be installed, operated, serviced, and maintained only by qualified personnel. Schneider Electric assumes no responsibility for consequences arising from the use of this material.
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
- This device is designed to protect personnel and equipment.
- This equipment must only be installed and serviced by qualified electrical personnel.
- Turn off all power supplying this equipment before working on or inside it. Lock the switchgear in the isolated position.
- Always use a properly rated voltage sensing device to confirm power is off.
- Put back all devices, doors, and covers before turning on power to this device.
Failure to follow these instructions will result in death or serious injury.
Product Identification and Date Coding
The product's manufacture date is coded as PP-YYYY-Www-D, where:
- PP: Plant code
- YYYY: Year of manufacture
- Www: Week of manufacture
- D: Weekday of manufacture (Monday = 1)
Example: 7Q-2014-W19-3 indicates a product manufactured at plant 7Q on Wednesday, May 7, 2014.
Product Description and Components
The VigiPacT RHM is a protection or monitoring relay. The diagrams show the device with its terminals and indicators:
- A: Power supply terminals
- B: Green power LED
- C: Red fault LED
- D: Set point and time delay settings
- E: Test and Reset buttons
- F: Sealing cover
Installation
The document provides detailed diagrams for the installation process, including mounting on DIN rails and securing the device.
Mounting on DIN rail:
- Slide the device onto the top of the DIN rail.
- Push the device down until it clicks into place.
Panel mounting:
- Ensure the panel cutout dimensions are correct.
- Secure the device using appropriate fasteners.
Connection and Wiring
The relay supply can be connected using various voltage ranges (12/48 V~, 12/24 V~, or ≥ 48 V~). The document illustrates cabling with MN (Undervoltage release) and MX (Shunt release) configurations.
Terminal Designations:
- MN: Undervoltage release
- MX: Shunt release
- Q1: Main circuit protection circuit-breaker
- Q2: DPN circuit breaker
- Q3: 1A circuit-breaker C or D curve
- T: Class 2 insulation transformer (for VA1,A2 ≤ 24 V AC)
- Z: DC supply must be galvanically insulated from the network
- T1-T2, S1-S2, M1-M2: A or OA type toroid or rectangular sensor (if I∆n ≥ 500 mA)
- A1-A2: Auxiliary supply
- T1-T2: Sensor
- 11-14: "Supply voltage presence" relay
- 26-25: Device Test
- 27-25: "Fault" status Reset
- 31-32-34: "Fault" changeover relay
Terminal Capacity and Cable Lengths:
The document specifies the maximum cable length and cross-sectional area for various terminals, including:
- Terminals 11, 14: 0.2-4 mm² (AWG 24-12)
- Terminals 31, 32, 34: 0.2-2.5 mm² (AWG 24-14)
- Terminals A1, A2: 0.2-2.5 mm² (AWG 24-14)
- Terminals T1, T2: 0.14-1.5 mm² (AWG 26-16)
- Terminals 25, 26, 27: < 10 m (30 ft)
It also details specifications for rectangular sensors and toroids, including their dimensions and compatible current ratings (e.g., I∆n ≥ 0.3 A).
Settings and Testing
Setting the tripping current (I∆n):
If I∆n is set to 30 mA, the tripping is instantaneous (At = 0s).
Test Procedure:
A test with tripping is compulsory on installation startup. The procedure involves simulating a fault condition to verify the relay's operation. This can be done locally using the Test/Reset buttons or remotely.
- Local Test: Press the Test button.
- Remote Test: Use external pushbuttons with low-level contacts (1 mA at 4 V) connected to the appropriate terminals.
Resetting the relay:
The RH99M model features automatic resetting. For other models, the Reset button can be used.
Status LEDs
The relay is equipped with status LEDs to indicate its operational state:
- On (Green LED): Normal operation.
- Fault (Red LED): Indicates a fault condition, such as detected fault current or a faulty sensor-relay link.
Other LED indications include absence of power or device not working, and detected anomalies.
Characteristics
The VigiPacT RHM monitors networks with:
- Voltage: < 1000 V AC; 50 Hz, 60 Hz, 400 Hz
- Overvoltage category: 4
- Storage temperature: -55...+85°C (-67...+185° F)
- Operating temperature: -35...+70°C (-31...+158° F)
- Measurement accuracy: 7%
- Maximum consumption: 4 VA
- Degree of protection: IP 20
Sealing and Commissioning
Sealing: The device can be sealed using a sealing cover to prevent unauthorized access to the settings.
Commissioning: Before performing a dielectric test, the power supply (A1-A2) must be disconnected. Failure to follow these instructions can result in equipment damage.
