YDM10 molded case circuit breaker (hereinafter referred to YDM10 MCCB ), mainly applied to non-frequent operation to AC 50Hz, rated working voltage up to 380V, rated current up to 600A of the power distribution network circuits used to distribute power and protect circuits and power equipment from damage fault overload, short circuit, under-voltage.
YDM10 MCCB derived transparent case circuit breakers, cover the use of new, high-temperature, high-strength materials made of polycarbonate can be intuitive judgments contact-off state, widely used in construction sites place temporary electricity.
This product meets the GB14048.2 standards.

■ maximum ambient air temperature is positive forty degrees Celsius, five degrees Celsius lower limit of negative twenty-four-hour average does not exceed the positive thirty-five degrees Celsius.
■ elevation: the installation site altitude does not exceed 2000m.
■ Pollution Degree: III level.
■ with the vertical gradient of not more than 5 degrees.
■ Installation Environmental conditions:
□ no significant shake and shock vibration.
□ no explosion hazard in the medium, the medium does not enough to corrode metal and damage the insulation of gas and dust (including conductive dust);
□ In the absence of rain and snow.
□ atmospheric relative humidity in the ambient air temperature is positive does not exceed forty degrees fifty percent; at lower temperatures can have a higher relative humidity; the wettest month of the monthly average maximum relative humidity of ninety percent while the average minimum temperature for the month was positive twenty-five degrees Celsius, and taking into account the temperature changes on the surface of condensation.

◆ overcurrent trip during overload conditions (inverse operation) Disconnect:
◆ breaker in the ambient air temperature is positive forty degrees Celsius, while each pole inverse energized disconnect feature. (See table below)
◆ overcurrent release off under short circuit conditions.
◆ breaker predetermined setting current value should be instantaneous action.
◆ & nbsp; the basic parameters of the circuit breaker. (See table below)

test current Title	initial state	l/ln	agreed time
			lnm = 100 (A)		lnm (A)
			ln≤63	63	250	600
conventional non-tripping current	cool	1.05	1h	2h	2h	2h
Conventional tripping current	Hot	1.30	1h	2h	2h	2h
to return to the current	cool	3.0	5s	8s	8s	12s

Type	instantaneous operating current value	Setting tolerance
YDM10-100	10ln	± 20%
YDM10-225	10ln	± 20%
YDM10-600	10ln	± 20%

Type	frame degree rated current lnm (A)	Rated insulation voltage Ui (V)	rated voltage Ue (V)	Rated frequency (Hz)	circuit breakers rated ultimate breaking capacity lcu (kA)		rated current ln (A)
					AC
					380V	COSφ
YDM10-100	100	380	AC380	50	15	0.3	15,20,25,30,40,50,60,80,100
YDM10-225	250	380	AC380	50	20	0.25	100,120,140,150,170,200,250
YDM10-600	600	380	AC380	50	30	0.25	200,250,300,350,400,500,600

■ operating mechanism
□ motorized operating mechanism closes
□ When operating with electric circuit breaker mechanism, rated control supply voltage at any voltage between 85% to 110%, and should be able to ensure reliable circuit breaker is closed.
. a controlled 110% of the rated supply voltage, no-load closing operation, should not cause any damage to the circuit breaker;
Under b. In 85% of rated control supply voltage, circuit breaker within the allowable operation time, through the appropriate machinery and rated short-circuit breaking capacity of the current should be able to reliably closed.
□ Disconnect:
. a shunt release with disconnection: When the release operation of the control voltage therebetween between 70% and 110%, under all operating conditions at the circuit breaker, should lead to shunt release trip.
. b with undervoltage release disconnect: When the rated working voltage rating dropped to between 70% and 35%, the undervoltage release should be action; undervoltage release Release rated lower than the supply voltage 35% of the voltage, the undervoltage release should be able to prevent the circuit breaker is closed; when the power supply voltage is equal to or greater than 85% release rated operating voltage should be able to ensure that the circuit breaker is closed.
c coordination with SCPD of auxiliary contacts: circuit breaker auxiliary contact is recommended to use RL6-25 / 6, connected in series to protect, at 1.1 times the rated working voltage, power factor of the test circuit in between 0.5-0.7 can By fusing time bear within its short-circuit current 1000A (AC RMS) assessment.
■ Install
Check the parameters of the actual needs on the nameplate is consistent □ before installation, and then screw (or bolt) vertically fixed circuit breaker mounting plate.
□ main circuit wiring:
a plate before wiring: copper wire with the corresponding cross-section, the outer layer of an appropriate amount of insulation stripped length of the insert wire hoop hole, the wire hoop cladding pressed firmly pack the wire, and then the connection hole wire hoop and circuit breakers Terminals fastened by screws;
For copper, the first wiring board fixed on the circuit breaker, and then with copper fixed.
After b board Wiring: fixed terminal block shown in Figure 1, then the corresponding standoff.
■ Auxiliary circuit wiring:
Press the corresponding auxiliary circuit breaker nameplate wiring.
■ Insert spacer
■ Check:
Breaker before working in the control installation inspection requirements, which should be reliable fixed attachment portion; breaker several times repeated operations, its operating mechanism should be flexible, and reliable.
■ Use and maintenance:
□ periodic check, add oil in transmission parts;
□ periodic inspection, remove surface dust shell; good insulation;
□ periodic inspection, remove metal particles interrupter chamber wall and gate chip and black soot, arcing good effect. As interrupter damage, the circuit breaker can not continue to be used;
□ after long-term use, can remove burrs and metal particles contact surfaces, maintaining good electrical contact; maintenance of more than 4, & nbsp;
Staff need to have a certain expertise can be conducted, other unskilled persons shall not be implemented.
□ In the selection of the circuit breaker, breaker on technical parameters should be consistent with the actual requirements;
□ breaker various features and accessories from the factory setting, the use of non-arbitrary regulation;
□ breaker after an overload or short circuit protection, should be excluded fault, then closing operation;
□ breaker in use or storage, transport, shall be subjected to rain invasion and fall;

& nbsp;