Huanyu HYM1L Series, Installation And Operation Instruction Manual

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2. When an earth leakage or an electric shock occurs in the protected
circuit, as long as the earth leakage current reaches the set earth
leakage operating current value, the output signal of the secondary
winding of the zero-sequence current transformer will trigger the
thyristor to conduct, and the earth leakage trip will be energized and
pulled in, so that the earth leakage breaker will be tripped, thus cutting
off the power supply to protect against earth leakage and electric shock.
See Figure 2 for the principle of operation.
3. When the protected circuit is overloaded or short-circuited, the thermal-
magnetic trip completes the delay or instantaneous tripping to make the
earth leakage circuit breaker operate, thus cutting off the power supply
to protect against overload or short-circuit.
Figure 2 Principle of operation
VI. Outline and Installation Dimensions (see Figure 3 and Table 10)
Table 10 Outline and installation dimensions
Model
Number
of poles
Outline dimensions (max) nm Installation dimensions (mm)
A B C D a b φd
HYM1L-125L
2 62 150 75 94 — 129 4.5
3 92 150 75 94 30 129 4.5
4 122 150 75 94 60 129 4.5
HYM1L-125M
2 62 150 92 110 — 129 4.5
3 92 150 92 110 30 129 4.5
4 122 150 92 110 60 129 4.5
HYM1L-250L
2 75 165 72 94 — 127 4.5
3 107 165 72 94 35 127 4.5
4 142 165 72 94 70 127 4.5
HYM1L-250M
2 75 165 90 110 — 127 4.5
3 107 165 90 110 35 127 4.5
4 142 165 90 110 70 127 4.5
HYM1L-400
3 150 257 106.5 146.5 44 194 7
4 198 257 106.5 146.5 94 194 7
HYM1L-630
3 210 280 115.5 155 70 243 7
4 280 280 115.5 155 140 243 7
Test resistor
Test button
Circuit breaker
Electronically
controlled
earth leakage trip
Zero sequence
current
transformer
Load
Test resistor
Test button
Circuit breaker
Electronically
controlled
earth leakage
trip
Zero sequence
current
transformer
Motor