Meidensha Protective Relays For Switchgear

Manufacturer: Meidensha Corporation

Features

MEIDEN High-performance multi-function digital relay

We have a selection of switchgear protective relays to best suit intended applications. All series are digitalized. A self-diagnosis function displays the details of an abnormality detected in the product, allowing a prompt appropriate countermeasure to be taken.
MEIDEN multi-function digital relay
High performance and high functional digital relay offering excellent cost performance JEC2500 compliant and B402 applicable
MEIDEN High-performance multi-function digital relay
A multi-function all-digital relay, providing protection, monitoring, control, and measuring functions
JEC2500 compliant and B402 applicable
MEIDEN MRR Series unit type digital relay
High functional compact digital relay with smooth renewal capability
JEC2500 compliant and B402 applicable

Applications

MEIDEN multi-functional digital relay network systems

MRR Series Digital Relays

1. Spot Network Relay
A relay for protecting and controlling incoming power equipment in a spot network, incorporating such functions as reverse power shut-off, differential voltage closing operation, non-voltage closing operation, and overcurrent protection
Applicable also to a system with a cogeneration system linked to a network bus lines.
Typical applications

2. Voltage Adjustment Relay
A relay that gives control commands to a tap changer during an on-load operation to maintain the desired voltage level.
*This relay works even at a reverse power flow.
Typical applications

3. Temporary Protective Relay incorporating MRR relays)
This provides a temporary protection through DZ and DG elements when the protective relays are shut down during maintenance, etc.
Typical applications

Specifications

MEDIMULseries(MEIDEN multi-function digital relay)

Functions	Specifications Current set values for a 5A rated CT only and divide by 5 for a 1A CT			R1	R2	R3	R4	B1	B2	F1	F2
				HV incoming substations	Main transformer secondary	MV incoming 1	MV incoming 2	Bus (for EVT)	Bus (for ZPD)	Feeder (for EVT)	Feeder (for ZPD)
	Device	Setting range	Operating time
Protection elements	51L	1.0 to 8.0 A, lock (steps of 0.1 A)	It = 0.5 to 10.0 (steps of 0.1) 3 characteristics (inverse, long, ultra)	3	2	2	2			2	2
	51H	1.0 to 80 A, lock (steps of 1 A)	0.04 to 1.00 s, definite time (steps of 0.01 s)	3	2	2	2			2	2
	51G	0.1 to 2.0 A, lock (steps of 0.1 A)	0.05 to 1.00 s, definite time (steps of 0.01 s) with malfunction countermeasure against inrush current
	27	10 to 110 V, lock (steps of 1 V)	0.05 to 10.00 s, definite time (steps of 0.05 s)				3	3	3
	59	100 to 150 V, lock (steps of 1 V)	0.1 to 10.0 s, definite time (steps of 0.1 s)
	64 (EVT)	3 to 80 V, lock (steps of 1 V)	0.2 to 30.0 s, definite time (steps of 0.1 s)
	64 (ZPD)	30 to 400 mV, lock (steps of 5 mV)	0.2 to 30.0 s, definite time (steps of 0.1 s)
	67G (EVT)	Io = 1.0 to 6.0 mA, lock ZCT secondary (steps of 0.1 mA) Vo: 3 to 80 V (steps of 1 V) ϕ: Advance of 0 to 80° (steps of 1°)	0.1 to 2.0 s, definite time (steps of 0.1 s)
	67G (ZPD)	Io = 1.0 to 6.0 mA, lock ZCT secondary (steps of 0.1 mA) Vo: 30 to 400 mV (steps of 5 mV) Vo: 3 to 80 V (steps of 1 V)	0.1 to 2.0 s, definite time (steps of 0.1 s)
Measuring	Item	Measuring range	Class, response
	Current	CT primary rated current x (0.03 to 1.99) A	Class 1.5, response: 0.5 s	3	3	3	3			3	3
	Voltage	VT primary rated voltage x (0.03 to 1.40) kV	Class 1.5, response: 0.5 s				3	3	3
	Zero phase voltage	1.0 V to 130.0 V at EVT third voltage	Response: 0.5 s
	Zero phase voltage	6.0 to 600.0 mV at ZPD secondary voltage	Response: 0.5 s
	Maximum zero phase voltage	EVT primary rated voltage x (0.03 to 1.40) kV	Class 1.5 response: 5 cycles
	Maximum zero phase voltage	ZPD primary rated voltage x (0.03 to 1.40) kV	Response: 5 cycles
	Leakage current (residual)	CT secondary rated current (A) x (200 to 400) mA	Response: 0.5 s
	Leakage current (ZCT)	0.10 to 30.00 mA at ZCT secondary current	Response: 0.5 s

Note: * of O* indicates the number of phases.
(*) Type list

Abbreviations	R1	R2	R3	R4	B1	B2	F1	F2
Application	HV incoming(residual 51 G)	Main transformer secondary,MV generator(for EVT)	MV incoming, MV generator(for ZPD)	MV main transformer secondary	Bus(for EVT)	Bus(for ZPD)	Feeder(for EVT)	Feeder(for ZPD)
Type (5 A rating)	MR63M-01	MR63M-02	MR63M-03	MR63M-04	MB63M-01	MB63M-02	MF63M-01	MF63M-02
Type (1 A rating)	MR63M-01A	MR63M-02A	MR63M-03A	MR63M-04A	MB63M-01	MB63M-02	MF63M-01A	MF63M-02A


Types		S2 unit	S1 special unit	Built-in device
Product name		Spot network relay	Voltage adjustment relay for distribution substations	Temporary protective relay
Type		MN80S2-01	MT80S1-01/01A	MR3-1003
Rating	Current	5A	5/√3 / √3A	5A
Rating	frequency	50/60Hz	50Hz	60Hz
Normal service conditions	Ambient temperature	Range of performance guarantee: 0 ~ 40°C	←	←
		Range of operation guarantee: -10 ~ 50°C	←	←
		Range of recovery guarantee: -20 ~ 60°C	←	←
	Relative humidity	30 ~ 80%	←	←
	Altitude	2,000 m or less	←	←
Frequency characteristics		Rated frequency = operating value with fluctuation of ±5%: Within ±5% of rated frequency
Insulation resistance		Between electrical circuits: 5 MΩ Between the whole electrical circuits and casing (earth potential): 10 MΩ Provided that the relative humidity is 80% or less.	← ← ←	Between electrical circuits: 2 MΩ Between the whole electrical circuits and casing (earth potential): 2 MΩ Provided that the relative humidity is 80% or less.
Withstand voltage		Between electrical circuits: 2000 V for one minute Between the whole electrical circuits and casing (earth potential): 2000 V for one minute	← ←	← ←
Lightning impulse withstand voltage		Positive and negative 1.2/50 μs waveforms applied 3 times each. Between control circuits: 3 kV Between the whole electrical circuits and earth: 4.5 kV	← ← ←	← Between the whole electrical circuits and earth: 4 kV
Noise immunity		EFT/B tested other than B-402	← ←	B-402 tested
Contact capacity	Control outputs	Current capacity 5 A, closing 10 A (0.5 s), opening 0.1 A (DC110 V, R load)	AC 250 V, open/close 1.5 A (inductive load: COS φ = 0.4)	5 A continuous (max 15 A, 2 seconds)
Contact capacity	External display	Standstill output open/close 60 mA	←	Current capacity 5 A, interruption 0.5 A (R load)
Installed relay elements	Main detects	67L, 67H, 78, 51L/H, 57 27S, 78, 27B, 84S	90R·L, 59B, 27B	44SX1, 44SX2, 44SD, 44SR 51D, 51φ 67G, 67GA1, 67GA2, 64 51H, 51A, 51, 51GA, 51G 27B, 64B
Installed relay elements	Fault detects	67LF, 67HF, 51F, 27SF, 78F, 27BF, 84SF	59A, 27A	51DF, 51F, 64F, 51GF, 27F