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
|
| 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
Electronic 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 |
Electronic release protection character curve
Protection performance of residual current release
Outline and installation dimensions
Installation type: Fixed, Plug-in, Withdrawable type
Breaker’s installation dimensions
Outline and installation dimensions
Outline and installation dimensions
Outline and installation dimensions
Outline and installation dimensions
Outline and installation dimensions
Outline and installation dimensions
English
