Lovato RD. 2 operation thresholds.

Lovato Electric

RD Earth Leakage Relays

Lovato RD. Flush mount, external current transformer (CT), 2 operation thresholds, adjustable tripping set points and delay time.

R2D – 2 operation thresholds, flush mount, external CT, fail safe.

R3D – 2 operation thresholds, flush mount, external CT, fail safe, flag indicator.

R4D – 2 operation thresholds, flush mount, external CT, fault current measurement, digital display, fail safe, flag indicator.

The Lovato RD Earth Leakage Protection Relays are suitable for industrial circuit protection applications. The RD series adjustable tripping parameters (shown below) ensure the device is a versatile solution that can be easily adapted to the end user’s needs.

 

General Characteristics:

– Earth leakage relay type A.
– 2 output relays each with 1 changeover contact, configurable 2 tripping or 1 tripping and 1 alarm.
– Configurable fail safe pre-alarm and operation.
– Automatic toroid connection control.
– Green power LED indicator (ON).
– Red relay tripped LED indicator (TRIP).
– Red tripping pre-alarm LED indicator (ALARM).
– Front TEST button.
– Manual resetting by front RESET button or remote contact closing.
– Automatic resetting by remote contact closing or rear jumper connection.
– Constant toroid-relay circuit control.
– Flag indicator (TRIP MEMORY) (R3D-R4D only).
– Digital fault current measurement and display with configurable tripping value memory (R4D only).
– Shunt tripping circuit operating test (TCS) (R4D only).
– Flush mount 96 x 96mm housing with transparent cover.
– IEC protection degree: IP20 at terminals, IP40 on front with cover.
– Adjustments for R2D & R3D:
• Configurable tripping set point (IΔn):
0.025-0.25A.
0.25-2.5A.
2.5-25A.
25-250A (with external multiplier RX10).
• Pre-alarm set point: Fixed 70%.
• Configurable tripping delay time (t):
0.02-0.5s.
0.2-5s.
– Adjustments for R4D:
• Configurable tripping set point (IΔn):
0.03-0.3A.
0.3-3A.
3-30A.
30-300A (with external multiplier RX10).
• Pre-alarm set point: Fixed 70%.
• Configurable tripping delay time (t):
0.03-0.5s.
0.3-5s.

 

Order Code Auxiliary Supply Voltage Output Contacts Weight (kg)
R2D415 110-125VAC, 220-240VAC, 380-415VAC. 2 0.395
R3D415 110-125VAC, 220-240VAC, 380-415VAC. 2 0.405
R4D415 110-125VAC, 220-240VAC, 380-415VAC. 2 0.570

 

(Please see attached PDF’s for further information)