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Phase Failure Relays
MKS-MKC Series
Summary
Overheating and damage of 3-phase motor due to phase fault is one of the common faults faced by industrial plants. Thermomagnetic relay, an important component of motor protection, is too slow to ensure fault tripping because of its electromechanical structure and high current setting range. The design of MKS-MKC series relays eliminates these negative effects.
¡ñEnvironmental working temperature: - 5/50 ¡ãC
¡ñNon-flammable case
¡ñTrack Installation or Panel Installation
¡ñProtection Level: IP20
¡ñEC 60255-3, EC 60255-6, EC 60870-5, EC 60529 |
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Product Selection Table |
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Phase Fault Relay |
phase sequence fault |
PTC protect |
fixed Out-off-balance |
Adjustable Out-off-balance |
No zero line |
Interruption delay |
Turn off delay |
1 C/O contact |
1 N/O contact |
DIN1 Track installation |
DIN2 Track installation |
Pieces / boxes |
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Product code |
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MKC-01 |
Phase Fault Relay |
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¡ñ |
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¡ñ |
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¡ñ |
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¡ñ |
10 |
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MKS-01 |
Phase Fault Relay |
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¡ñ |
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¡ñ |
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¡ñ |
¡ñ |
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10 |
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MKC-03 |
Phase Fault Relay |
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¡ñ |
¡ñ |
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¡ñ |
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¡ñ |
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¡ñ |
10 |
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MKS-03 |
Phase Fault Relay |
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¡ñ |
¡ñ |
¡ñ |
¡ñ |
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¡ñ |
¡ñ |
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10 |
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PMKC-04 |
Phase Fault Relay |
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¡ñ |
¡ñ |
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¡ñ |
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¡ñ |
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¡ñ |
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¡ñ |
10 |
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MKC-05 |
Phase Fault Relay |
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¡ñ |
¡ñ |
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¡ð |
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¡ñ |
¡ñ |
¡ñ |
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¡ñ |
10 |
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MKC-05P |
Phase Fault Relay |
£¨With PTC3£© |
¡ñ |
¡ñ |
¡ñ |
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¡ð |
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¡ñ |
¡ñ |
¡ñ |
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¡ñ |
10 |
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MKC-06 |
Phase Fault Relay |
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¡ñ |
¡ñ |
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¡ð |
¡ñ |
¡ñ |
¡ñ |
¡ñ |
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¡ñ |
10 |
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MKC-06P |
Phase Fault Relay |
£¨With PTC3£© |
¡ñ |
¡ñ |
¡ñ |
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¡ð |
¡ñ |
¡ñ |
¡ñ |
¡ñ |
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¡ñ |
¡ñ |
10 |
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PTC-3 |
Three Thermistor Groups |
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50 |
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MKC-20 |
Phase Fault Relay |
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¡ñ |
¡ñ |
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¡ð |
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¡ñ |
¡ñ |
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10 |
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¡ð May close |
Protect characteristics
1. Phase fault
When the monitored 3-Phase Voltage is valid, output Relay is ON, and if any of the three Relays fails, the output device immediately shuts down.
2. phase sequence
When the phase sequence is correct (L1, L2, L3 clockwise), the output Relay is ON (that is, start), and if the phase sequence is changed for any reason, the output Relay is immediately closed.
3. PTC protection
If the coil temperature in the motor exceeds Tc, PTC temperature limit (see PTC-3 below), output Relay is immediately closed.
4. Fixed Voltage Out-off-balance
When the phase Voltage Out-off-balance is larger than the fixed value (20% or 40%), the output Relay is closed within 0,2 second.
5. Adjustable Voltage Out-off-balance
When the interphase Voltage Out-off-balance is less than the user adjustment value, output Relay starts (ON).
If the Out-off-balance value exceeds the user settin limit (5%-15%), output Relay closes at the end of the user settin¡¯s delay time (0,1... 10s).
If the failure disappears within the delay time, the output Relay does not close and the motor continues to work normally. In addition to these features, MKC-05P Relay is also turned on when R-phase Voltage exceeds 178 V AC. Its phase sequence and Out-off-balance LED flicker at the same time.
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MKS-01 |
MKS-03 |
MKC-01 |
MKC-03 |
MKC-04 |
MKC-05 |
MKC-05P |
MKC-06 |
MKC-06P |
MKC-20 |
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Shell |
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size |
PK22 |
PK25- PK280 |
PK22 |
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weight |
0,1kg/24Carton / boxes |
0,3kg/10Carton / boxes |
0,1kg/10Carton / boxes |
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measure |
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Voltage Out-off-balance |
20% fixed |
40% fixed |
20% fixed |
40% fixed |
5%-15%Adjustable |
5%-25%Adjustable |
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Power Supply |
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working voltage |
230VAC |
400VAC |
230VAC |
220VAC |
400VAC |
380VAC |
230VAC |
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working frequency |
50/60 Hz |
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Scope of work |
¡À20%Un |
¡À10%Un |
¡À30%Un |
¡À10%Un |
¡À30%Un |
¡À10%Un |
¡À30%Un |
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output |
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Output contact |
1NO,8A,2000VA |
1CO,8A,2000VA |
1CO 5A,1250VA |
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delay time |
0,2 sec. fixed |
0,1-10 secAdjustable |
0,1-20 sec.Adjustable |
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environment condition |
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ambient temperature; humidity |
5/+55¡æ;90% |
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Overvoltage category |
III |
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Connect |
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install |
Track installation |
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line type |
3-Phase+Zero line |
3-Phase |
3-Phase+Zero line |
3-Phase |
3-Phase bit+Zero line | |
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