مقایسه نحوه نمایش فانکشنهای حفاظتی در ANSI , IEC

اجزا سیستم حفاظتی

·عضو سنجشی: تبدیل کمیات ولتاژ یا جریان شبکه از مقدار اصلی به مقدار قبول برای سیستم حفاظتی در این قسمت صورت میپذیرد که شامل ترانس جریان و ترانس ولتاز و... میباشد.

ANSI	IEC 60617	Description
21FL	FLOC	Fault locator
21G	Z<	Three-phase underimpedance protection, low-set stage
24	U/f>	Overexcitation, low-set stage
24	U/f>>	Overexcitation, high-set stage
25	SYNC	Synchro-check/ voltage check, stage 1
25	SYNC	Synchro-check/ voltage check, stage 2
27	3U<	Three-phase undervoltage, low-set stage
27	3U<<	Three-phase undervoltage, high-set stage
27, 47, 59	U1< U2> U1>	Phase-sequence voltage protection, stage 1
27, 47, 59	U1< U2> U1>	Phase-sequence voltage protection, stage 2
32	P←	Three-phase underpower or reverse power, stage 1
32	P←	Three-phase underpower or reverse power, stage 2
32	P←	Three-phase underpower or reverse power, stage 3
32P/32Q	P>→/Q>→	Three-phase directional overpower, stage 1
32P/32Q	P>→/Q>→	Three-phase directional overpower, stage 2
32P/32Q	P>→/Q>→	Three-phase directional overpower, stage 3
37	3I<	Three-phase non-directional undercurrent, stage 1
37	3I<	Three-phase non-directional undercurrent, stage 1
37	3I<	Three-phase non-directional undercurrent, stage 2
40	X<	Three-phase underexcitation protection, low-set stage
40	X<<	Three-phase underexcitation protection, high-set stage
46	I2>	Negative-phase sequence, low-set stage
46	I2>>	Negative-phase sequence, high-set stage
46	ΔI>	Phase discontinuity
46R		Phase reversal protection
48, 14, 66	Is²t, n<	Three-phase start-up supervision for motors (incl. I2t and speed device modes, and start-up counter)
49F	3Ith>	Three-phase thermal protection for cables
49M/49G/49T		Three-phase thermal protection for devices (motors, generators and transformers)
50N	I0>>>	Non-directional earth-fault, instantaneous stage
50N/51N	I0>>	Non-directional earth-fault, high-set stage
50P/51P	3I>>>	Three-phase non-directional overcurrent, instantaneous stage
51	3I>	Three-phase non-directional overcurrent, low-set stage
51C, 37C, 68C	3I> 3I<	Three-phase overload protection for shunt capacitor banks
51N	I0>/SEF	Non-directional earth-fault, low-set stage (or SEF=sensitive earth-fault protection)
51NC	3ΔI>	Three-phase current unbalance protection for H-bridge connected shunt capacitor banks
51NC	ΔI>	Current unbalance protection for shunt capacitor banks
51P-1	3I>	Three-phase non-directional overcurrent, low-set stage
51V	I(U)>	Voltage-dependent overcurrent, low-set stage
51V	I(U)>>	Voltage-dependent overcurrent, high-set stage
551P-2	3I>>	Three-phase non-directional overcurrent, high-set stage
59	3U>	Three-phase overvoltage, low-set stage
59	3U>>	Three-phase overvoltage, high-set stage
59N	U0>	Residual overvoltage, low-set stage
59N	U0>>	Residual overvoltage, High-set stage
59N	U0>>>	Residual overvoltage, instantaneous stage
60	FUSEF	Fuse failure supervision
67-1	3I>→	Three-phase directional o/c, low-set stage
67-2	3I>>→	Three-phase directional o/c, high-set stage
67	3I>>>→	Three-phase directional o/c, instantaneous stage
67N	I0>>>→	Directional earth-fault, instantaneous stage
67N	I0>>→	Directional earth-fault, high-set stage
67N	I0>→	Directional earth-fault, low-set stage
67N/51N	I0>→ /SEF	Directional earth-fault, low-set stage (or SEF=sensitive earth-fault protection)
68	3I2f>	Three-phase transformer inrush and motor start-up current detector
79	0 → 1	Auto-reclosure
81U/81O	f, df/dt	Underfrequency or overfrequency, stage 1 (incl. rate of change)
87G	3DI>	Stabilized three-phase differential protection for generators
87G/87M	3DI>	High-impedance or flux-balance based differential protection for generators and motors
87N	ΔI0>, REF	High-impedance based restricted earth-fault
87T	3ΔI>, 3ΔI>>	Stabilized three-phase differential protection for transformers
87TN	ΔI0>	Stabilized restricted earth-fault, stage A