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Earth Fault Relays & Torrioids

Here you will find an introduction to our earth fault relay's, along with descreiptions and part numbers. Information on our integral torroids follows below.

Introduction

Our earth fault relay's ensure the protection of electrical installations. Supplementary protection against direct connections can be achieved with our 30mA version's. This range of electronic earth fault relays provides monitoring of earth fault currents. When the fault current rises above the selected level, the output contacts of the
product operate.

Depending on the relay selected, it can have either fixed or adjustable sensitivity, a time delay is also available for
selectivity purposes. The relays are linked with detection torroids, 14 separate types are available, circular and
rectangular.

Descriptions & Part Numbers - Earth Fault Relays

Earth Fault Relay with Separate Detection Torroids
DesignationCharacteristicsWidth (in 17.5mm)Cat ref.
Earth fault relay C/O contact
5A AC1
Instant trip, fixed sensitivity
IΔn = 30mA
1 Mod
HR500
Earth fault relay C/O contact
5A AC1
Instant trip, fixed sensitivity
IΔn = 300mA
1 Mod
HR502
Earth fault relay C/O contact
6A AC1
Adjustable sensitivity
IΔn = 30mA, 100mA, 300mA
500mA, 1A, 3A, 10A
Instant trip or time delay
0.1 - 0.3 - 0.4 - 0.5 - 1 - 3 secs
3 Mod
HR510
Earth fault relay C/O contact
6A AC1
Adjustable sensitivity
IΔn = 30mA, 100mA, 300mA
500mA, 1A, 3A, 10A
LED optical scale
Instant trip or time delay
0.1 - 0.3 - 0.4 - 0.5 - 1 - 3 secs
3 Mod
HR520
Earth fault relay C/O contact
6A AC1
Adjustable sensitivity
IΔn = 30mA, 100mA, 300mA
500mA, 1A, 3A, 10A
LED optical scale
Instant trip or time delay
0.1 - 0.2 - 0.25 - 0.3 - 0.4 - 0.5 secs
3 Mod
HR522
Earth fault relay C/O contact
6A AC1
Adjustable sensitivity
IΔn = 500mA, 1A, 3A, 5A,
10A, 20A & 30A
LED optical scale
Instant trip or time delay
0.1 - 0.2 - 0.25 - 0.3 - 0.4 - 0.5 secs
3 Mod
HR523
Earth fault relay C/O contact
6A AC1
Trip / reclose input feature
Adjustable sensitivity
IΔn = 30mA, 100mA, 300mA,
500mA, 1A, 3A, 5A, 10A & 30A
LCD Display
Instant trip or time delay
0.02 - 0.1 - 0.3 - 0.4 - 0.5 - 1 -
3 - 5 - 10 secs
3 Mod
HR525
Earth fault relay C/O contact
6A AC1
Solid State relay output
Trip / reclose input feature
Adjustable sensitivity
IΔn = 30mA, 100mA, 300mA,
500mA, 1A, 3A, 5A, 10A & 30A
LCD Display
Instant trip or time delay
0.02 - 0.1 - 0.3 - 0.4 - 0.5 - 1 -
3 - 5 - 10 secs
3 Mod
HR534
Earth Fault Relays with Integral Torroids
DesignationCharacteristicsWidth (in 17.5mm)Cat ref.
Earth fault relay with integral
torroid adjustable sensitivity
25mm² max. cable size
Adjustable sensitivity
IΔn - 30mA, 100mA, 300mA,
500mA, 1A & 3A
Instant trip or time delay
0.1 - 0.3 - 0.5 - 0.75 - 1 secs
4 Mod
HR440
Earth fault relay with integral
torroid adjustable sensitivity
35mm² max. cable size
Adjustable sensitivity
IΔn - 30mA, 100mA, 300mA,
500mA, 1A & 3A
Instant trip or time delay
0.1 - 0.3 - 0.5 - 0.75 - 1 secs
4 Mod
HR441

Descriptions & Part Numbers - Torroids

Circular Section Torroid
CharacteristicsCat ref.
ø 30mm
HR700
ø 35mm
HR701
ø 70mm
HR702
ø 105mm
HR703
ø 140mm
HR704
ø 210 mm
HR705
Rectangular Section Torroid
DimensionsCat ref.
70 x 175mm
HR830
115 x 305mm
HR831
150 x 350mm
HR832
Rectangular Split Torroid
DimensionsCat ref.
20 x 30mm
HR820
50 x 80mm
HR821
80 x 80mm
HR822
80 x 121mm
HR823
80 x 161mm
HR824