- 7 -
B. When I
∆
≥ I∆
n, the earth leakage indicator light is on, and S2-S3 is open
and S1-S2 is closed.
C. Under the condition that the earth leakage indicator light is on:
(1) If I
∆
＜
I
∆
n, the alarm state can be released by pressing the "Reset"
button, then the earth leakage indicator light will go out, the alarm state
will be released, and the module will return to the "A" state.
(2) If after the "Reset" button is pressed, the earth leakage indicator will go
out, and it will light up immediately after the "Reset" button is released,
which indicates that when I
∆
≥ I∆
n, the alarm state is not released, and
that the module will remain in the "B" state all the time and will not return
to the "A" state until I
∆
＜
I
∆
n.
Attention: The HYM1LB Earth Leakage Circuit Breaker will not trip due
to earth leakage fault even if it is not connected to the auxiliary power
supply Us. Whether S2-S3 and S1-S2 are closed in each working state
can be detected by a multimeter.
10. See Table 8 and Table 9 for the cross-section area of connecting
conductor of earth leakage circuit breaker.
Table 8 Cross-section area of the connecting conductor of the main
circuit
Rated current 16
20 25 32
40
50 63 80 100 125 160
180
200
225
250 315
350 400
Cross-section
area S of
conductor
(mm
2
)
2.5
4
6
10 16 25 35 50 70 95 120 185 240
Table 9 Cross-section area of the connecting conductor of the main
circuit
Rated current In (A)
500
630
Copper conductor
Pcs
2
2
Cross-section area
(mm
2
)
150
185
Copper busbar
Pcs
2
2
Cross-section area
(mm
2
)
30×5
40×5
V. Structure and Principle of Operation
1. This series of earth leakage circuit breakers are electronic circuit
breakers, which are mainly composed of zero-sequence current
transformers, electronically controlled earth leakage trips and circuit
breakers with overload and short-circuit protection. All parts are installed
in a pair of molded cases.
