Miniature Circuit Breakers Series VB51

Functions

Overload protection
Short circuit protection
Isolation
Controlling
Used in residential building, non-residential building, industry,
energy and infrastructure.


Technical specifications

Standards: IEC 60898-1, IEC 60947-2
Rated current In (A) : 0.5, 1, 1.6, 2, 4, 6, 10, 13, 16, 20, 25, 32,
40, 50, 63
Rated voltage Un (V AC): 230/400
Operational voltage (V AC): Min. 24; Max. 250/440
Rated frequency (Hz): 50/60
Rated insulation voltage (V AC): 500
Number of poles (P): 1, 1P+N, 2, 3, 3P+N, 4

Thermal operating limit (In): 1.13 - 1.45
Rated impulse withstand voltage Uimp (kV): 6
Rated switching capacity Icn (kA): 10
Degree of protection: IP20, with connected conductors
Electrical life (times): 16,000
Mechanical life (times): 35,000
Mounting position: Any
Conductor cross-sections
Solid and stranded (mm²): 0.75-35
Finely stranded with end sleeve (mm²): 0.75-25
Terminal tightening torque (N·m): 2.8
Ambient temperature (°C): -25 ~ +45, max. 95 % humidity
Storage temperature (°C): -40 ~ +75
Altitude (meters): Max 2,000

Features

The handle being sealable or equipped with padlock bracket
avoids dangerous operation changes (ON / OFF)
The handle provides a clear indication of the contact position
Adequate printing of all data on the front provides long-term
identification
Energy limiting class: 3
The emission of ionized gases is limited to the severest
restrictions: 45 mm grid distance
This MCB for household in accordance with: IEC 60898 -1, B, C
and D tripping characteristics
This MCB for industry in accordance with IEC 60947-2,
instantaneous tripping characteristics with release B: 4 In,
release C: 8 In, release D: 12 In
This MCB may be extended with:
A wide range of RCDs
Full sets of accessories

Applications and functions

Incoming and outgoing function in distribution systemsSwitching and protection devices for motors, transformers andcapacitors
Disconnect or units with features for stopping and switching off inemergency mechanisms and terminal covers in conjunction withlikeable rotary operating
Available in the following versionsPower protection: the overload and short-circuit releases aredesigned for the protection of cables, leads and non-motor loads
Motor protection: the overload and short-circuit releases aredesigned for optimized protection and direct-on-line starting ofinduction squirrel-cage motors.
The circuit breakers for motorprotection are susceptible to phase failure and feature an adjustabletrip class

Applications and functions

Suitable for AC network circuit which rated voltage to AC 690 V andrated current to 1250 A.
With overload long delay protection function, which used to distributeelectricity and protect the line and power supply equipment fromoverload, short circuit and other hazards.

Rated Current is adjustable by both thermal and magnetical.Smaller product size, easier to install accessories.
Available in the following versions.
Power protection: the overload and short-circuit releases aredesigned for the protection of cables, leads and non-motor loads.
Motor protection: the overload and short-circuit releases aredesigned for optimized protection and direct-on-line starting ofinduction squirrel-cage motors.
The circuit breakers for motorprotection are susceptible to phase failure and feature an adjustabletrip class.

Functions
Overload protection
Short circuit protection
Isolation
Controlling
Used in residential building, non-residential building, industry,energy and infrastructure.
Features
Small size,simple structure,and high reliability
Full sets of accessoriesThe handle provides a clear indication of the contact positionThis MCB for household in accordance with: IEC 60898-1, B, Cand D tripping characteristics
Both top and bottom incoming lines are acceptable

Functions

Overload protection
Short circuit protection
Isolation
Controlling
Used in residential building, non-residential building, industry,
energy and infrastructure.


Technical specifications

Standards: IEC 60898-1, IEC 60947-2
Rated current In (A) : 0.5, 1, 1.6, 2, 4, 6, 10, 13, 16, 20, 25, 32,
40, 50, 63
Rated voltage Un (V AC): 230/400
Operational voltage (V AC): Min. 24; Max. 250/440
Rated frequency (Hz): 50/60
Rated insulation voltage (V AC): 500
Number of poles (P): 1, 1P+N, 2, 3, 3P+N, 4

Thermal operating limit (In): 1.13 - 1.45
Rated impulse withstand voltage Uimp (kV): 6
Rated switching capacity Icn (kA): 10
Degree of protection: IP20, with connected conductors
Electrical life (times): 16,000
Mechanical life (times): 35,000
Mounting position: Any
Conductor cross-sections
Solid and stranded (mm²): 0.75-35
Finely stranded with end sleeve (mm²): 0.75-25
Terminal tightening torque (N·m): 2.8
Ambient temperature (°C): -25 ~ +45, max. 95 % humidity
Storage temperature (°C): -40 ~ +75
Altitude (meters): Max 2,000

Features

The handle being sealable or equipped with padlock bracket
avoids dangerous operation changes (ON / OFF)
The handle provides a clear indication of the contact position
Adequate printing of all data on the front provides long-term
identification
Energy limiting class: 3
The emission of ionized gases is limited to the severest
restrictions: 45 mm grid distance
This MCB for household in accordance with: IEC 60898 -1, B, C
and D tripping characteristics
This MCB for industry in accordance with IEC 60947-2,
instantaneous tripping characteristics with release B: 4 In,
release C: 8 In, release D: 12 In
This MCB may be extended with:
A wide range of RCDs
Full sets of accessories

Applications and functions

Incoming and outgoing function in distribution systemsSwitching and protection devices for motors, transformers andcapacitors
Disconnect or units with features for stopping and switching off inemergency mechanisms and terminal covers in conjunction withlikeable rotary operating
Available in the following versionsPower protection: the overload and short-circuit releases aredesigned for the protection of cables, leads and non-motor loads
Motor protection: the overload and short-circuit releases aredesigned for optimized protection and direct-on-line starting ofinduction squirrel-cage motors.
The circuit breakers for motorprotection are susceptible to phase failure and feature an adjustabletrip class

Applications and functions

Suitable for AC network circuit which rated voltage to AC 690 V andrated current to 1250 A.
With overload long delay protection function, which used to distributeelectricity and protect the line and power supply equipment fromoverload, short circuit and other hazards.

Rated Current is adjustable by both thermal and magnetical.Smaller product size, easier to install accessories.
Available in the following versions.
Power protection: the overload and short-circuit releases aredesigned for the protection of cables, leads and non-motor loads.
Motor protection: the overload and short-circuit releases aredesigned for optimized protection and direct-on-line starting ofinduction squirrel-cage motors.
The circuit breakers for motorprotection are susceptible to phase failure and feature an adjustabletrip class.