MK1000A

MK1000A Combined Overcurrent & Earth Fault Relay

Features Technical Data
• Microprocessor based numerical relay
• Current measurement based on RATINGS
fundamental frequency Rated current ( In ) : 5A
Rated frequency : 50 or 60 Hz
• Three-phase, low-set overcurrent
Burden : < 0.3 VA at In
• Three-phase, high-set overcurrent Themal withstand : 4 x In continuous
• Low-set earth-fault
AUXILIARY SUPPLY
• High-set earth-fault Model MK1000A-240A(6) : 198 ~ 265 V AC
• Definite time for low-set and high-set Model MK1000A-240AD(6) : 85 ~ 265 V AC
110 V DC ~ 370 V DC
• Five selectable IDMT characteristic curves
Model MK1000A-24D : 18 ~ 72 V DC
• Local display of measured and set values Supply frequency : 50 or 60 Hz
• Programmable relay outputs V A rating : 3 VA typical

• Non-volatile fault values recording ACCURACY

• Complies with IEC 60255-26 standard Protection thresholds : ± 5%
Time delay : ± 5% with a

PHUONGLAI.COM
SETTING RANGES minimum of 50 ms

i ) Overcurrent elements CONTACTS

Low-set ( I > ) : 0.5 A to 10.0 A,
Trip Contacts ( R1 & R2 )
step 0.05 A
Rated voltage : 250V AC/DC
: 10% to 200%,
Contacts arrangement : Change-over
step 1%
Contact rating : 5A
Low-set time multiplier ( kt >): 0.05 to 1.0,
Contact material : Silver alloy
step 0.01
Expected electrical life : 100,000 operations at
Low-set definite time ( t > ) : 0.05 to 99s
rated current
High-set ( I >> ) : 0.5 A to 99.9 A,
Expected mechanical life : 5 x 106 operations
step 0.10 A or
disable
INDICATORS
: 10% to 1998%,
Auxiliary supply : Green indicator
step 2%
Pick-up : Red indicator
High-set delay time ( t >> ) : 0.05 sec to 2.5 sec,
Trip : 7-segment display
step 0.01
and red indicators

ii ) Earth-fault element MECHANICAL

Low-set ( I o > ) : 0.10 A to 5.0 A, Mounting : Panel mounting
step 0.05 A Front panel : Standard DIN
: 2% to 100% 96 mm x 96 mm
Low-set time multiplier(kt o>): 0.05 to 1.0, Approximate weight : 0.75 kg
step 0.01
Low-set definite time ( t o > ) : 0.05 to 99s
High-set ( I o >> ) : 0.10 A to 50 A, ENVIRONMENTAL CONDITIONS
step 0.10 A or Temperature : -5˚C to +55˚C
disable Humidity : 56 days at 93% RH and 40˚C
: 2% to 1000%, non-condensing
step 2%
High-set delay time ( t o >> ) : 0.05 sec to 2.5 sec,
step 0.01
 NORMAL INVERSE VERY INVERSE LONG TIME INVERSE
MK1000A Combined Overcurrent & Earth Fault Relay

TYPICAL APPLICATION DIAGRAM

Aux
L N MK1000A
NO NC COM COM NC NO
1 2 3 4 5 6 7 8

R1 R2
EXTREMELY INVERSE NORMAL INVERSE 1.3/10

PHUONGLAI.COM
9 10 11 12 13 14 15 16

L1
L2
L3
N

CASE DIMENSIONS
96 mm
96 mm

Front

110 mm
100 mm

Side

Ordering Information
91.0 ± 0.5 mm
MODEL DESCRIPTION
MK1000A-240A For 50Hz system, auxiliary voltage 198 ~ 265 V AC
91.0 ± 0.5 mm

MK1000A-240AD For 50Hz system, auxiliary voltage 85 ~ 265 V AC or 110~370 V DC

MK1000A-24D For 50Hz system, auxiliary voltage 18 ~ 72 V DC Panel Cutout
MK1000A-240AD6 For 60Hz system, auxiliary voltage 85 ~ 265 V AC or 110~370 V DC
MK1000A-24D6 For 60Hz system, auxiliary voltage 18 ~ 72 V DC