Product

3SM29

Independent power supply with build-in power source,directly draws power from the incoming end to avoid the risk of protection function failure caused by external power supply failure.

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

Applications and functions

● Incoming and outgoing function in distribution systems

● Switching and protection of short circuit and overload for motors, transformers and capacitors

● Stopping and switching off in an emergency in conjunction with lockable rotary operating mechanisms and terminal covers

● Available in the following versions:

● System protection: the overload and short-circuit releases are designed for the protection of cables, leads and non-motor loads

● Motor protection: the overload and short-circuit releases are designed for optimized protection and direct-on-line starting of induction squirrel-cage motors

Features

● Complete current range

● High-breaking capacity

(1) B: Basic breaking capacity type

(2) N: Normal breaking capacity type

(3) S: Standard breaking capacity type

(4) H: High-breaking capacity type

(5) G: Ultrahigh breaking capacity type

Frame rated current	Rated ultimate short circuit breaking capacity Icu
Frame rated current	20kA	35kA	50kA	65kA	85kA
A: 125 A		N
B: 160 A	B	N	S		L
C: 250 A	B	N	S	H	L
D: 400 A		N	S	H	L
E: 630 A		N	S	H	L
F: 800 A		N	S	H
G: 1250 A			S	H	G
H: 1600 A			S	H	G

● Microprocess controlled

3SM29 series circuit breaker (Inm ≥ 250) adopt advanced microprocess electronic release that can intelligentize the protection

● Convenient installation

3SM29 series circuit breaker provides three installation types as follow:

Fixed installation with front connection and rear connection

Plug-in installation with front connection and rear connection

Drawer installation

Instruction of type code

Technical specifications

Selection and ordering data

Thermal Magnetic Type

Selection and ordering data

Thermal Magnetic Type

Electronic Type

Motor driven mechanism

Function

● Used for opening and closing the circuit breaker remotely

Technical specifications

Model type	MD1	MD2	MD3
Application	3SM29-250, 3SM29-400	3SM29-125, 3SM29-160	3SM29-630, 3SM29-800 3SM29-1600
Operating voltage range	(85 % - 110 %) Un
Rated control voltage	220 V AC, 380 V AC, 220 V DC, 110 V DC	220 V AC, 380 V AC, 220 V DC, 110 V DC	220 V AC, 380 V AC, 220 V DC, 110 V DC
Operating current (A)	≤ 2	≤ 0.5	≤ 7.5
Start power consumption in 220/380 V AC (VA)	510	220	660
Continuance power consumption in 220/380 V AC (VA)	360	110	110 (180)
Start power consumption in 110/220 V DC (W)	510	220	600
Continuance power consumption in 110/220 V DC (W)	360	110	180
Opening time (s)	0.1	0.1	0.1
Closing time (s)	0.1	0.1	0.3
Eletrical life (times)	4000	8000	3000
Protection degree	IP40

Selection and ordering data

Rotary handle operation mechanism

Function

● Used for opening and closing the circuit breaker

● Used for rotating the circuit breaker, not pushing-pulling it upwards-downwards

Selection and ordering data

Shunt release

Function

● Used for opening the circuit breaker remotely

Technical specifications

Model type	SR91	SR92	SR93
Application	3SM29-125 3SM29-160	3SM29-250 3SM29-400	3SM29-630, 3SM29-800 3SM29-1600
Operating voltage range	(70 % - 110 %) Un
Rated control voltage	220 V AC, 380 V AC, 220 V DC, 110 V DC	220 V AC, 380 V AC, 220 V DC, 110 V DC	220 V AC, 380 V AC, 220 V DC, 110 V DC
Response time (ms)	≥ 20, ≤ 60
Power consumption in 220/380 V AC (VA)	150	150	150
Power consumption in 110/220 V DC (W)	150	150	150

Selection and ordering data

Under-voltage release

Function

● Used for opening the circuit breaker when energy cuts off or voltage goes below 70 % of the operating voltage

Technical specifications

Model type	UR91	UR92	UR93
Application	3SM29-125, 3SM29-160	3SM29-250, 3SM29-400	3SM29-630, 3SM29-800, 3SM29-1600
Action voltage range	(35 % - 70 %) Ue
Guarantee close voltage range	(85 % - 110 %) Ue
Guarantee no-close voltage range	≤ 35 % Ue
Rated control voltage (V)	220 V AC, 380 V AC, 220 V DC, 110 V DC	220 V AC, 380 V AC, 220 V DC, 110 V DC	220 V AC, 380 V AC, 220 V DC, 110 V DC
Response time (ms)	≥ 20, ≤ 60
Power consumption in 220/380 V AC (VA)	10	10	10
Power consumption in 110/220 V DC (W)	4	4	4

Selection and ordering data

Auxiliary contact and alarm contact

Function

● Indication of contacting status

● Used for supplying electrical signal of the circuit breaker according to the operating position

Selection and ordering data

Accessaries introduction

Tripping curve

Microprocessor control panel

ST110-M (ST110-M/F) Microprocessor electronic release panel

ST110-H (ST110-H/F) Microprocessor electronic release's panel

Releasing curve

Microprocessor electronic release main function

Main function of microprocessor electronic release
Main circuit load indication	The LED in panel indicates 60 %, 80 %, 90 %, 100 %
Power supply indication	The LED in panel indicates
Self-diagnose indication	The LED in panel indicates
Overload pre-warning indication	The LED in panel indicates
Earth fault indication	The LED in panel indicates
Thermal memory	Record over-load cumulate caloric effect
Fast set protection character curve	Basis on different purpose ,user can choose short-circuit release's character (curve F, R, B, M)
Signal output of the transition ray contact between breaker and ST-200 Intelligentized control module	Overload pre-warning releasing alarm Earth fault alarm Signal of breaker's ON / OFF
Releasing test	Test socket
Setting panel parameter User can reset the protection character when the main circuit with or without power running	Switch commutating Switch commutating Switch commutating Switch commutating Switch commutating