发明名称 |
Protection circuit for resistive heating element using differential current transformer and small short circuit bias current in conjunction with relay |
摘要 |
A small bias current is supplied through resistor 132. If earth leakage occurs current difference transformer 126 and other circuit elements release power from relay 131 so that switch 124 opens. If a fault develops current through resistor 132 is not sensed and the circuit elements prevent switch being reactivated.
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申请公布号 |
NZ335415(A) |
申请公布日期 |
2000.01.28 |
申请号 |
NZ19980335415 |
申请日期 |
1998.01.30 |
申请人 |
FISHER & PAYKEL LTD |
发明人 |
BUTLER, RICHARD GEORGE ARTHUR |
分类号 |
H02H3/347;(IPC1-7):H02H3/347 |
主分类号 |
H02H3/347 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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