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4.25
Earth Fault Relays
Earth Fault Relay with Separate Detection Torroids
Designation
Characteristics
Width
Cat ref.
Earth fault relay C/O contact
Instant trip, fixed sensitivity
1 Mod
HR500
5A AC1
I Δn = 30mA
Earth fault relay C/O contact
Instant trip, fixed sensitivity
1 Mod
HR502
5A AC1
I Δn = 300mA
Earth fault relay C/O contact
Adjustable sensitivity
3 Mod
HR510
6A AC1
I Δn = 30mA, 100mA, 300mA
500mA, 1A, 3A, 10A
Instant trip or time delay
0.1 - 0.3 - 0.4 - 0.5 - 1 - 3 secs
Earth fault relay C/O contact
Adjustable sensitivity
3 Mod
HR520
6A AC1
I Δn = 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
Earth fault relay C/O contact
Adjustable sensitivity
3 Mod
HR522
6A AC1
I Δn = 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
Earth fault relay C/O contact
Adjustable sensitivity
3 Mod
HR523
6A AC1
I Δn = 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
Earth fault relay C/O contact
Adjustable sensitivity
3 Mod
HR525
6A AC1
I Δn = 30mA, 100mA, 300mA,
Trip / reclose input feature
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
Earth fault relay C/O contact
Adjustable sensitivity
3 Mod
HR534
6A AC1
I Δn = 30mA, 100mA, 300mA,
Solid State relay output
500mA, 1A, 3A, 5A, 10A & 30A
Trip / reclose input feature
LCD Display
Instant trip or time delay
0.02 - 0.1 - 0.3 - 0.4 - 0.5 - 1 -
3 - 5 - 10 secs
These units ensure the
protection of electrical
installations. 30mA versions can
provide additional protection
against direct connection. 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 in section (4.27).
Common characteristics
• Positive safety: the relay trips
in the event of a break in the
relay/torroid link.
• Positive reset required after a
fault is detected.
• Test button for simulation of a
fault.
• Protected against nuisance
tripping from transients.
• DC sensitive.
• Output: 1 C/O contact
250V~ 5/6A AC1.
• Visual display of fault by red
LED.
Specific device features
• LCD display on HR525 &
HR534.
• Adjustment of sensitivity and
delay (selectable).
• Extra positive safety contact
(1C/O 250V~ 6A AC1).
• Display of fault current before
it triggers the relay (5% to
75%).
• Extra output contact (250V
0.1A max.) to enable remote
indication if fault currents over
50% of IΔn.
• Remote test and reset
(opto-coupled).
Torroids
Circular dia. 35, 70, 105, 140,
210mm
Rectangular 70 x 175, 115 x 305,
150 x 350mm
Connection capacity
Relay - 1.5 to 6mm2
Relay - torroid link
2 wires, 25m max.
Test and remote reset link
3 wires, 20m max.
For enclosure selection, please
consult us.
Width
1 Mod - 17.5mm
3 Mod - 52.5mm
4 Mod - 70mm
6 Mod - 105mm
Supply Contactor/trip
Conforms to IEC 1008
Detection
torroid
Earth
leakage
relay
HR500
HR510
HR520
Protection
Devices