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Hitachi

Hitachi Industrial Equipment Systems Co., Ltd.

Magnetic Starters & Contactors : Electromagnetic Starters with 2E Thermal Overload Relay : 8C - 11

Rating and Specifications

Frame 8C 10C 10B 11
TYPE Electromagnetic starter Without enclosure Non-reversible B)H8C-TK B)H10C-TK — B)H11-TK
Reversible — — B)H10B-RTK B)H11-RTK
With enclosure Non-reversible B)SH8C-TK B)SH10C-TK — B)SH11-TK
Reversible — — B)SH10B-RTK B)SH11-RTK
Thermal overload relay TR12B-2E
Rated insulation voltage AC660V
Max. rated capacity of motor JIS and JEM Rated operational current (A)
AC3		 200-220V 11 12 12 12
380-440V 6 9 9 9
500-550V 5 8 6 8
Three-phase motor (kW)
AC3 and AC2		 200-220V 2.2 2.5 2.5 2.5
380-440V 2.2 4 4 4
500-550V 2.2 4 3.7 4
IEC Rated operational current (A)
AC3		 220-240V 11 12 12 12
380-440V 7 9 9 9
500-550V 5 8 6 8
Three-phase motor (kW)
AC3		 220-240V 2.5 3 3 3
380-440V 3 4 4 4
500-550V 3 4 3.7 4
Characteristics of operation coil Coil burden (max.) (V.A) Pick-up 45/40 45/40 45/40
Hold-in 9/7 9/7 9/7
Coil consumption (mean) (W) 2.4 2.4 2.4
Pick-up voltage (% of rated voltage) 65 75 68
Drop-out voltage (% of rated voltage) 50 50 50
Operating time (ms) 200V, 50Hz
(reference value)		 Pick-up 10-15 10-15 10-15
Drop-out 10-30 10-30 10-30
Auxiliary contact Type of contacts Twin contact
Numbers Standard 1NO or 1NC (2NO 1NC)
×2		 1NO 1NC or
2NO 2NC
Maximum
Mechanical interlock unit — ● —
Life (million times) Mechanical 10 5 10
Electrical 2 1 2
Available voltage range of operational coil (V) 24-550

Remarks

*1
Rating of Auxiliary Contact
Rated operational current Rated thermal currentMinimum rating
AC (AC15) DC L/R<40mn
200 - 220V 380 - 440V 500 -550V 48V 110V
2A 1A 0.75A 0.7A 0.3A 10A 24V
10mA
*2
The ratings of Max rated capacity of motor are in the parenthesis are provided with an enclosure.
*3
The pick-up and drop-out voltage apply to 200V, 60Hz power source. In case of 50Hz, the figures for frame 8C-125C are about 10% smaller and figures for frame 150C-600C are about the same.

Note

*1
Application of Category AC3 and AC2 to the reversible electromagnetic starters shall be limited to regular reversible operation in which a motor starts reverse rotation after it has once stopped. Category AC4 is applicable when the motor starts reverse rotation before it has completely stops. And the contactors used for reversible operation, they must be electrically interlocked using by mutual NC auxiliary contacts.
*2
Since Operating time depends on coil voltage, frequency or phase etc. the starters must not be applied for timing use.
*3
* : Thermal overload relay for 220 - 240V 7.5kW is TR50B-2E.

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