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DZ10 molded case circuit breaker
1、 Scope of application: DZ10 plastic shell circuit breaker (referred to as DZ10 plastic shell circuit breaker), mainly suitable for circuits in the d
Product details
Product Introduction
1、 Scope of application
DZ10 Plastic Shell Circuit Breaker (abbreviated as)DZ10 molded case circuit breaker）It is mainly suitable for circuits in distribution networks that operate infrequently with AC 50Hz, rated working voltage up to 380V, and rated current up to 600A. It is used to distribute electrical energy and protect lines and power equipment from damage caused by overload, short circuit, undervoltage and other faults.
The transparent shell circuit breaker derived from DZ10 plastic shell circuit breaker is made of a new, high temperature resistant, high-strength polycarbonate material for the cover, which can intuitively judge the on/off status of the contacts. It is widely used in temporary power plants on construction sites.
This product meets the requirements of GB14048.2 standard.
The transparent shell circuit breaker derived from DZ10 plastic shell circuit breaker is made of a new, high temperature resistant, high-strength polycarbonate material for the cover, which can intuitively judge the on/off status of the contacts. It is widely used in temporary power plants on construction sites.
This product meets the requirements of GB14048.2 standard.
2、 Model and specifications
3、 Normal working conditions and installation conditions
The upper limit of the surrounding air temperature is positive 40 degrees Celsius, the lower limit is negative 5 degrees Celsius, and the 24-hour average does not exceed positive 35 degrees Celsius.
■ Altitude: The altitude of the installation site shall not exceed 2000m.
Pollution level: Level III.
The inclination with respect to the vertical plane shall not exceed 5 degrees.
■ Installation environmental conditions:
A place without significant shaking or impact vibration.
In a medium without explosive hazards, and without gases and dust (including conductive dust) that can corrode metals and damage insulation;
In a place without rain or snow invasion.
The relative humidity of the atmosphere shall not exceed 50% when the ambient air temperature is positive 40 degrees Celsius; At lower temperatures, there can be higher relative humidity; The average maximum relative humidity of the wettest month is 90%, and the average minimum temperature of that month is+25 degrees Celsius, taking into account the condensation that occurs on the surface of the product due to temperature changes.
■ Altitude: The altitude of the installation site shall not exceed 2000m.
Pollution level: Level III.
The inclination with respect to the vertical plane shall not exceed 5 degrees.
■ Installation environmental conditions:
A place without significant shaking or impact vibration.
In a medium without explosive hazards, and without gases and dust (including conductive dust) that can corrode metals and damage insulation;
In a place without rain or snow invasion.
The relative humidity of the atmosphere shall not exceed 50% when the ambient air temperature is positive 40 degrees Celsius; At lower temperatures, there can be higher relative humidity; The average maximum relative humidity of the wettest month is 90%, and the average minimum temperature of that month is+25 degrees Celsius, taking into account the condensation that occurs on the surface of the product due to temperature changes.
5、 Main parameters and technical performance
The overcurrent release disconnects in the event of overload (reverse time limit action):
When the ambient air temperature is positive 40 degrees Celsius, the circuit breaker exhibits a reverse time limit breaking characteristic where all poles are energized simultaneously. (See table below)
The overcurrent release disconnects in the event of a short circuit.
The circuit breaker should operate instantaneously at the specified set current value.
Basic parameters of circuit breakers. (See table below)
When the ambient air temperature is positive 40 degrees Celsius, the circuit breaker exhibits a reverse time limit breaking characteristic where all poles are energized simultaneously. (See table below)
The overcurrent release disconnects in the event of a short circuit.
The circuit breaker should operate instantaneously at the specified set current value.
Basic parameters of circuit breakers. (See table below)
| Test current name | Initial state | l/ln | appointed time | |||
| lnm=100（A） | lnm（A） | |||||
| ln≤63 | 63＜ln≤100 | 250 | 600 | |||
| Promise not to trip current | cold | 1.05 | 1h | 2h | 2h | 2h |
| conventional tripping current | heat | 1.30 | 1h | 2h | 2h | 2h |
| Returnable current | cold | 3.0 | 5s | 8s | 8s | 12s |
| model | Instantaneous action current setting value | Setting allowable error |
| DZ10-100 | 10ln | ±20% |
| DZ10-225 | 10ln | ±20% |
| DZ10-600 | 10ln | ±20% |
| model | Shell level rated current lnm (A) | Rated insulation voltage Ui (V) | Rated working voltage Ue (V) | Rated frequency (Hz) | Rated limit circuit breaker breaking capacity lcu (kA) | Rated current ln (A) | |
| AC | |||||||
| 380V | COSφ | ||||||
| DZ10-100 | 100 | 380 | AC380 | 50 | 15 | 0.3 | 15. 20, 25, 30, 40, 50, 60, 80, 100 |
| DZ10-225 | 250 | 380 | AC380 | 50 | 20 | 0.25 | 100, 120, 140, 150, 170, 200, 250 |
| DZ10-600 | 600 | 380 | AC380 | 50 | 30 | 0.25 | 200, 250, 300, 350, 400, 500, 600 |
5、 Other
Operating mechanism
□ Electric operating mechanism closed
When the circuit breaker is operated by an electric mechanism, it should be able to ensure reliable closure at any voltage between 85% and 110% of the rated control power supply voltage.
a. Under 110% rated control power supply voltage, performing no-load closing operation should not cause any damage to the circuit breaker;
b. At 85% of the rated control power supply voltage, the circuit breaker should be able to reliably close within the allowable operating time when passing the corresponding current with the rated mechanical short-circuit breaking capacity.
□ Disconnect:
a. Disconnect with a shunt release: When the control voltage during the operation of the release is between 70% and 110%, it should cause the shunt release to trip under all operating conditions of the circuit breaker.
b. Disconnect with undervoltage release: When the rated working voltage drops between 70% and 35% of the rated value, the undervoltage release should activate; When the power supply voltage is lower than 35% of the rated working voltage of the undervoltage release, the undervoltage release should be able to prevent the circuit breaker from closing; When the power supply voltage is equal to or greater than 85% of the rated operating voltage of the release, the circuit breaker should be able to close.
c. Coordination and cooperation between auxiliary contacts and SCPD: RL6-25/6 is recommended for the auxiliary contacts of the circuit breaker, which are connected in series for protection. In a test circuit with 1.1 times the rated working voltage and a power factor between 0.5-0.7, they can withstand a short-circuit current value of 1000A (AC effective value) passing through during the melting time.
■ Installation
Before installation, check whether the parameters on the nameplate match the actual needs, and then use screws (or bolts) to vertically fix the circuit breaker on the installation plate.
Main circuit wiring:
a. Pre board wiring: Use copper wire of corresponding cross-section, strip off an appropriate length of insulation outer layer, insert it into the hole of the wire clamp, press the outer layer of the wire clamp tightly, wrap the wire firmly, and then tighten the connection hole of the wire clamp with the terminal of the circuit breaker with screws;
For copper bars, first fix the terminal block on the circuit breaker, and then fix it to the copper bar.
b. Rear wiring: Fix the wiring board as shown in Figure 1, and then secure it with the corresponding wires.
■ Auxiliary circuit wiring:
The auxiliary circuit should be wired according to the corresponding nameplate of the circuit breaker.
■ Insert partition
■ Inspection:
Before the circuit breaker is put into operation, it should be checked according to the installation requirements, and its fixed connection part should be reliable; Repeatedly operate the circuit breaker several times, and its operating mechanism should be flexible and reliable.
■ Use and maintenance:
Periodic inspection, add lubricating oil to the transmission parts;
Periodic inspection to remove dust from the surface of the casing; Maintain good insulation;
Periodic inspection, remove metal particles and black smoke from the walls and grids inside the arc extinguishing chamber, and maintain good arc extinguishing effect. If the arc extinguishing chamber is damaged, the circuit breaker cannot continue to be used;
After long-term use, the burrs and metal particles on the contact surface can be removed to maintain good electrical contact; The maintenance of the above 4 items,
Personnel with certain professional skills are required to carry out the task, and other unskilled personnel are not allowed to carry it out.
When selecting a circuit breaker, the technical parameters on the circuit breaker should match the actual requirements;
The various characteristics and accessories of the circuit breaker are set by the manufacturer and cannot be adjusted arbitrarily during use;
After overload or short circuit protection, the circuit breaker should first eliminate the fault before closing the circuit;
During the use, storage, and transportation of circuit breakers, they must not be damaged or dropped by rainwater;
□ Electric operating mechanism closed
When the circuit breaker is operated by an electric mechanism, it should be able to ensure reliable closure at any voltage between 85% and 110% of the rated control power supply voltage.
a. Under 110% rated control power supply voltage, performing no-load closing operation should not cause any damage to the circuit breaker;
b. At 85% of the rated control power supply voltage, the circuit breaker should be able to reliably close within the allowable operating time when passing the corresponding current with the rated mechanical short-circuit breaking capacity.
□ Disconnect:
a. Disconnect with a shunt release: When the control voltage during the operation of the release is between 70% and 110%, it should cause the shunt release to trip under all operating conditions of the circuit breaker.
b. Disconnect with undervoltage release: When the rated working voltage drops between 70% and 35% of the rated value, the undervoltage release should activate; When the power supply voltage is lower than 35% of the rated working voltage of the undervoltage release, the undervoltage release should be able to prevent the circuit breaker from closing; When the power supply voltage is equal to or greater than 85% of the rated operating voltage of the release, the circuit breaker should be able to close.
c. Coordination and cooperation between auxiliary contacts and SCPD: RL6-25/6 is recommended for the auxiliary contacts of the circuit breaker, which are connected in series for protection. In a test circuit with 1.1 times the rated working voltage and a power factor between 0.5-0.7, they can withstand a short-circuit current value of 1000A (AC effective value) passing through during the melting time.
■ Installation
Before installation, check whether the parameters on the nameplate match the actual needs, and then use screws (or bolts) to vertically fix the circuit breaker on the installation plate.
Main circuit wiring:
a. Pre board wiring: Use copper wire of corresponding cross-section, strip off an appropriate length of insulation outer layer, insert it into the hole of the wire clamp, press the outer layer of the wire clamp tightly, wrap the wire firmly, and then tighten the connection hole of the wire clamp with the terminal of the circuit breaker with screws;
For copper bars, first fix the terminal block on the circuit breaker, and then fix it to the copper bar.
b. Rear wiring: Fix the wiring board as shown in Figure 1, and then secure it with the corresponding wires.
■ Auxiliary circuit wiring:
The auxiliary circuit should be wired according to the corresponding nameplate of the circuit breaker.
■ Insert partition
■ Inspection:
Before the circuit breaker is put into operation, it should be checked according to the installation requirements, and its fixed connection part should be reliable; Repeatedly operate the circuit breaker several times, and its operating mechanism should be flexible and reliable.
■ Use and maintenance:
Periodic inspection, add lubricating oil to the transmission parts;
Periodic inspection to remove dust from the surface of the casing; Maintain good insulation;
Periodic inspection, remove metal particles and black smoke from the walls and grids inside the arc extinguishing chamber, and maintain good arc extinguishing effect. If the arc extinguishing chamber is damaged, the circuit breaker cannot continue to be used;
After long-term use, the burrs and metal particles on the contact surface can be removed to maintain good electrical contact; The maintenance of the above 4 items,
Personnel with certain professional skills are required to carry out the task, and other unskilled personnel are not allowed to carry it out.
When selecting a circuit breaker, the technical parameters on the circuit breaker should match the actual requirements;
The various characteristics and accessories of the circuit breaker are set by the manufacturer and cannot be adjusted arbitrarily during use;
After overload or short circuit protection, the circuit breaker should first eliminate the fault before closing the circuit;
During the use, storage, and transportation of circuit breakers, they must not be damaged or dropped by rainwater;
6、 Appearance and installation dimensions
8、 Ordering Notice
When placing an order, please indicate the following points:
Product model and name: such as DZ10 molded case circuit breaker
Instantaneous tripping rated current: such as 320A.
Polarity: 4P
Order quantity: such as 230 pieces.
Ordering example: DZ10 molded case circuit breaker, 4P, 250A, 630 pieces.
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