The 3SW68 air circuit breaker not only provides protections against overload, short circuit, undervoltage but also has a lot of advantages like optimized size, inner communication module and the function of measurement and management to just name a few.
Applications and functions
● Distributing electricity and protecting loads from overload, short circuit, undervoltage, and residual current
● Providing high reliability of power supply by smart and optional protection
● Used as an isolator
● Operating the motor directly for occasionally starting and stopping when the rated current of the breaker is not higher than 630A
Standards
● IEC60947-1: Low-voltage switchgear and controlgear - Part 1: General rules
● IEC60947-2: Low-voltage switchgear and controlgear - Part 2: Circuit-breaker
● IEC60947-4-1: Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters –Electromechanical contactors and motor-starters
Instruction of type code
Features and benefits
● Low space requirements
3SW68 devices are very compact require very little space for installation. Frame A devices (up to 1600 A) fit into a 400 mm wide switchgear panel.
Frame B, C, D devices (up to 6300 A) are the smallest of their kind and with their smallest construction width fit into a 800 mm wide switchgear panel.
● Example of comparison with 3SW8 in measurement
● Modular design
Components like auxiliary, motorized operating mechanisms, electronic releases, current sensors, auxiliary circuit signaling switches, automatic reset devices, interlocks and engagement operating mechanisms can all be exchanged or retrofitted in the back-ground, thus allowing the circuit breaker to be adapted to new, changing required.
● Communication
The use of modern communication capable circuit breakers opens up completely new possibilities in terms of start-up, parameterization, diagnostic, maintenance and operation. This allows varieties of ways to reduce costs and to improve productivity in industrial plants, buildings and infrastructure projects.
● Strength of new material
Complete current range and high breaking capacity
Technical specifications
1. Front terminal is available for fixed version only.
2. Horizontal terminal is not available for circuit breaker with rated current 6300 A.
Electronic trip unit
Functions
Suitable for size A (3SW68-1600)
3SW68-AL electronic trip units are with LED displays, the protection value and delay time is set by dialing device.
● Type 3SW68-AL3: provides selective protections of long-time delayed protection, short-time delayed protection and instantaneous protection.
● Type 3SW68-AL4: provides additional selective earth fault protection and all protection functions of type 3SW68-AL3.
Characteristics
● Protection
Type 3SW68-AL3, suitable for size A 3SW68-1600
● Protection
Type 3SW68-AL4, suitable for size A 3SW68-1600
● Default settings
I = 1.0 In, t = 15 s;
Isd = 3.0 I , tsd = 0.4 s;
Ii = 10 In;
Ig = OFF, tg = 0.8 s.
Suitable for size A (3SW68-1600)
3SW68-AM and 3SW68-AH electronic trip unite quips with a LCD display, and all the operations can be conducted through function buttons.
● 3SW68-AM3: provides selective protections of long-time delayed protection, short-time delayed protection and instantaneous protection.
● 3SW68-AM4: provides additional selective earth fault protection and all protection functions of type 3SW68-AM3.
● 3SW68-AH: provides selective protections of long-time delayed protection, short-time delayed protection, instantaneous protection and earth faultprotection, as well as the communication function to take remote measurement, control, setting and communication.
Characteristics
● Protection
Type 3SW68-AM3, 3SW68-AM4, 3SW68-AH, suitable for size A 3SW68-1600
● Neutral pole protection
● Applications:
When the neutral line is thin, half value will be applied.
When the neutral line is the same as others, full value will be applied.
When harmonic wave is heavy, double or 1.6 times value will be applied.
● Setting range:
50 %, 100 %, 160 %, 200 %, OFF
Characteristics
● Protection
Type 3SW68-AL3, suitable for size A 3SW68-1600
● Protection
Type 3SW68-AL4, suitable for size A 3SW68-1600
● Default settings
I = 1.0 In, t = 15 s;
Isd = 3.0 I , tsd = 0.4 s;
Ii = 10 In;
Ig = OFF, tg = 0.8 s.
Suitable for size A (3SW68-1600)
3SW68-AM and 3SW68-AH electronic trip unite quips with a LCD display, and all the operations can be conducted through function buttons.
● 3SW68-AM3: provides selective protections of long-time delayed protection, short-time delayed protection and instantaneous protection.
● 3SW68-AM4: provides additional selective earth fault protection and all protection functions of type 3SW68-AM3.
● 3SW68-AH: provides selective protections of long-time delayed protection, short-time delayed protection, instantaneous protection and earth fault
protection, as well as the communication function to take remote measurement, control, setting and communication.
Characteristics
● Protection
Type 3SW68-AM3, 3SW68-AM4, 3SW68-AH, suitable for size A 3SW68-1600
● Neutral pole protection
● Applications:
When the neutral line is thin, half value will be applied.
When the neutral line is the same as others, full value will be applied.
When harmonic wave is heavy, double or 1.6 times value will be applied.
● Setting range:
50 %, 100 %, 160 %, 200 %, OFF
Suitable for size B/C/D (3SW68-2500/4000/6300)
3SW68-BL electronic trip unit equips with LED displays, the protection value and delay time is set by knobs.
● 3SW68-BL3: provides selective protections of long-time delayed protection, short-time delayed protection and instantaneous protection.
● 3SW68-BL4: provides additional selective earth fault protection and all protection functions of type 3SW68-BL3.
Characteristics
● Protection
Type 3SW68-BL3, suitable for size B/C/D 3SW68-2500/4000/6300
Type 3SW68-BL4, suitable for size B/C/D 3SW68-2500/4000/6300
● MCR & HSISC (Trip beyond limit) protection (selection function)
● Load monitoring (selection function)
● Default settings
I = 1.0 In, t = 15 s; Isd = 3.0 I , tsd = 0.4 s; (I²t = OFF) Ii = 10 In; Ig = OFF, tg = 0.8 s.
Suitable for size B/C/D (3SW68-2500/4000/6300)
3SW68-BM electronic trip unit equips with a LCD displays, the protection value and delay time are set by knobs, some functions can be set by function keys.
● 3SW68-BM3: provides selective protections of long-time delayed protection, short-time delayed protection and instantaneous protection.
● 3SW68-BM4: provides additional selective earth fault protection and all protection functions of type 3SW68-BM3.
Characteristics
● Protection
Type 3SW68-BM3, suitable for size B/C/D 3SW68-2500/4000/6300
● Protection
● Protection
● MCR & HSISC (Trip beyond limit) protection (selection function) - the same as type 3SW68-BL.
● Protection
Type 3SW68-BL3, 3SW68-BL4, suitable for size B/C/D 3SW68-2500/4000/6300
● Load monitoring (selection function) - the same as type 3SW68-BL.
● Default settings
I = 1.0 In, t = 15 s;
Isd = 3.0 IR, tsd = 0.4 s; (I t = OFF)
Ii = 10 In;
Ig = OFF, tg = 0.8 s.
Suitable for size B/C/D (3SW68-2500/4000/6300)
3SW68-BH electronic trip unit equips with a LCD displays, the protection value and delay time are set by function keys.Provides full selective protections of long-time delayed protection, short-time delayed protection, instantaneous protection and earth fault protection,as well as the communication function to take remote measurement, control, setting and communication.
Characteristics
● Protection
Type 3SW68-BH, suitable for size B/C/D 3SW68-2500/4000/6300
● Neutral pole protection
● Current imbalance protection
● Required current protection
Characteristics
● Under frequency protection
● Over frequency protection
● Reverse power protection
Characteristics
● Measurement
● Residual current protection (selection function)
● MCR & HSISC (Trip beyond limit) protection (selection function) - the same as type 3SW68-BL.
● Zone selective interlocking (ZSI) (selection function) - the same as type 3SW68-BL.
Characteristics
● Load monitoring (selection function)
● Earth alarm (selection function)
● Under voltage protection (selection function)
● Over voltage protection (selection function)
Characteristics
● Voltage imbalance protection (selection function)
● Phase sequence protection (selection function)
● Default settings
I = 1.0 In, t = 15 s;
Isd = 3.0 I , tsd = 0.4 s; (definite time)
Ii = 10 In;
Ig = OFF, tg = 0.8 s.
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