First, the scope

YDZ20L leakage circuit breaker is mainly used in AC 50Hz, rated voltage of 380V, rated current up to 630A of power distribution networks, as a personal electric shock or leakage protection device; also be used to prevent equipment insulation damage , fires caused by ground fault current danger; but also can be used to distribute power and protect circuits and power equipment overload and short circuit, also can be used as infrequent conversion of the lines used. YDZ20L series leakage circuit breakers derived products not leak alarm trip function can be used in uninterruptible power supply in the workplace.
YDZ20L leakage circuit breaker in line with GB 14048.2 standard.

two, YDZ20L leakage circuit breaker models and their specifications

Type Meaning Note:
Use code: no code distribution protection, motor protection have to "2".
Release mode and accessories code (see Table 1)
Poles: Four-pole, three-pole four-wire

three, YDZ20L leakage circuit breaker accessory code

overcurrent Release Information	Attachment Name
	without attachments	shunt release	auxiliary contacts	undervoltage release	auxiliary contact Shunt release	auxiliary contact Undervoltage release
instantaneous release	200	210	220	230	240	270
double release	300	310	320	330	340	370

NOTE: 240.340.270.370 applies only quadrupole product.

four, YDZ20L leakage circuit breakers normal operating conditions and installation conditions

◆ The ambient air temperature
. a maximum ambient air temperature does not exceed + 40 ℃;
. b average of 24 hours within the ambient air temperature does not exceed + 35 ℃;
. c ambient air temperature limit is not lower than -5 ℃;
Note: If the user leakage circuit breakers temperature have special requirements, in consultation with the manufacturer.
◆ Altitude: not more than 2000 meters.
◆ atmospheric conditions: relative humidity of the atmosphere around + 40 ℃ maximum temperature does not exceed 50%; at lower temperatures can have a higher relative humidity, the monthly average maximum relative humidity of wettest month was 90%, while the month The monthly average minimum temperature does not exceed + 25 ℃, and taking into account the temperature changes on the surface of condensation.
◆ Pollution Degree: III.
◆ installation conditions:
◇ leakage circuit breaker should be provided in accordance with the manufacturer's instruction manual installation requirements for installation. The terminals connected to the supply side, under the terminals connected to the load side, and the vertical gradient of not more than 5 °, and can not be installed in places subject to shock and vibration and rain and snow.
◇ Installation Category: III.
◇ external magnetic field: leakage circuit breaker is installed close to the external magnetic field sites, should not exceed 5 times the earth's magnetic field in any direction.

five, YDZ20L leakage circuit breaker main parameters and technical performance

1, basic parameters CM1L MCCB

Type	frame degree Rated current (Inm) A	Rated Voltage (Un) V	Rated Frequency (Hz)	Poles	Rated Current (In) A	Rated residual Operating current (I △ n) mA	Rated residual Hold Current (I △ no) mA	Residual Current Action time (s)
YDZ20L-160	160	380	50	3P + N 4P	50,63, 80,100, 125,160	50	25	general type (see Table 3) Delay type (see Table 4)
						100	50
						200	100
YDZ20L-250	250	380	50	3P + N 4P	100,125, 160,180, 200,225,250	50	25	general type (see Table 3) Delay type (see Table 4)
						100	50
						200	100
						300	150
YDZ20L-400	400	380	50	3P + N 4P	200,250, 315,350,400	100	50	general type (see Table 3) Delay type (see Table 4)
						200	100
						300	150
						500	250
YDZ20L-630	630	380	50	3P + N 4P	400, 500,630,	100	50	general type (see Table 3) Delay type (see Table 4)
						200	100
						300	150
						500	250

NOTE: Third gear adjustable residual operating current freedom of choice by the user.

★ general leakage breaker breaking time

applying current	I △ n	2I △ n	5I △ n
breaking time (s)	≤0.2	≤0.1	≤0.04

★ delay leakage circuit breaker breaking time

predetermined delay time	I △ n	5I △ n
0.2s	& lt; 0.4s	0.1 ~ 0.24s
0.4s	& lt; 0.6s	0.2 ~ 0.44s
0.8s	& lt; 1.0s	0.4 ~ 0.84s

★ rated ultimate short circuit breaking capacity and rated residual making and ability

Type	Rated ultimate short-circuit breaking capacity (Icu)		Rated residual making and breaking capacity (I △ m)		arcing distance (Mm)
	AC380V		AC220V
	RMS kA	COSφ	RMS kA	COSφ
YDZ20L-160	12	0.3	3	0.9	≤60
YDZ20L-250	15	0.3	4	0.8	≤60
YDZ20L-400	20	0.3	5	0.7	≤80
YDZ20L-630	20	0.3	5	0.7	≤80

Note: The rated short-circuit breaking capacity Ics = 0.5Icu.

◆ Shunt release:
◇ rated control supply voltage: AC220V, 380V, DC24V, 110V, 220V.
◆ Residual Current Operating Characteristic:
◇ Under normal operating conditions, the leakage breaker residual operating current of less than or equal to the rated residual operating current, and greater than the rated
◆ residual non-operating current
◇ leakage circuit breakers with the main power as an auxiliary power source, the requirements of normal operation leakage circuit breaker between 0.85 ~ 1.1Un.
◆ overcurrent release disconnect feature:
◇ overcurrent release disconnect feature (see table) under short circuit conditions;
◇ overcurrent release off characteristics under overload inverse of
When the ambient air temperature is + 40 ℃, the power distribution leakage circuit breakers in overcurrent release energized at the same time each pole, inverse time operating characteristic disconnect
◆ clearances and creepage distances:
CLEARANCE leakage circuit breaker is not less than 5.5mm; creepage distance of not less than 9mm.

Inm A	operating current value	accuracy setting value of
160,250,400,630	10In	± 20%

test current Title	Tuning Current multiple	test time (h)			initial state
		In≤63A	63A	225A
conventional non-tripping current	1.05	≥1	≥2	≥2	cold start
Conventional tripping current	1.30	& lt; 1	& lt; 2	& lt; 2	Hot start
return characteristics of the current	3.0	Return Time (s)			cold start
		5	8	12

★ mechanical and electrical life (see table)

Inm A	operating cycles per hour	operating cycles		The total number of
		powered	no power
160,250	120	1000	7000	8000
400,630	60	1000	4000	5000

★ size table manually operated mechanism mounted.

Type	DZ20Y, J, G-100	DZ20Y, J, G-225	DZ20Y-400	DZ20J, G-400 DZ20Y, J-630
Installation dimensions H	55	85	105	80
center operating handle with respect to the circuit breaker X value	0	0	0	0

Internal accessories ◆ leakage circuit breakers (leakage circuit breakers need to install internal accessories based on user)
◇ shunt trip
Shunt release Rated control supply voltage: AC50Hz, 220V, 380V; DC24V, at 70% to 110% of rated control supply voltage leakage circuit breakers reliably disconnect.
NOTE: When the selection voltage specifications DC24V, rated current should ≥4.5A.
◇ undervoltage release
When the voltage drops (or even slow decline) to 70% and 35% of rated voltage, under-voltage release shall operate; less than 35% at the time of release of the rated voltage, the undervoltage release should be able to prevent leakage breaker is closed; when the power supply voltage is equal to or greater than 85%, the undervoltage release should ensure reliable leakage circuit breaker is closed.
Undervoltage release is rated: AC50Hz, 220V, 380V.
Reminder: equipped with undervoltage release leakage breaker, only to pass to the undervoltage release at the rated voltage, leakage circuit breakers in order to carry out the closing operation, otherwise it may damage the leakage circuit breaker!
◇ auxiliary contacts
Auxiliary contacts leakage circuit breakers rated
Rated current
Rated current

frame degree rated current lnm (A)	Conventional thermal current lth (A)	AC 380V when le (A)	AC 220V when le (A)
≤225	3	0.26	0.14
≥400	6	3	0.2

six, YDZ20L series leakage circuit breakers Additional information

◆ classification
◇ divided by the number of poles:
. a four-pole leakage circuit breakers;
b. three-pole four-wire leakage circuit breaker.
◇ Press residual current breaking time points:
. a general type;
b. time delay.
◇ Press residual operating current points:
. a residual operating current not adjustable;
b. Adjustable residual current (third).
◆ structure and working principle
◇ structure:
YDZ20L leakage circuit breaker current action electronic leakage protection circuit breaker. The main components are: the main switch, zero-sequence current transformer, electronic amplification components, leakage release, the test device. All components are mounted in a plastic housing.
◇ works:
When appears or power supply protection circuit overload or short circuit, the main switch of the double release completion delay or instantaneous tripping, thereby cutting off the power play or short circuit overload protection. When the protection circuit leakage or physical shock, as long as the residual current reaches the setting operating current value, the secondary winding zero sequence current transformer outputs a signal, and by leakage release action, thereby cutting off the power, and start the drain electric shock protection.

Seven, shape and installation dimensions

Type	Poles	Dimensions (mm)															Installation dimensions (mm)
		A	B	C	D	H1	H2	H3	H4	L	L1	L2	L4	W1	W2	W3	a	b	φd
YDZ20L-160	3P + N & nbsp; 4P	143 ± 2.0	225 ± 2.3	104.5 ± 1.75	88.5 ± 1.75	2.5	3.5	41	24	267	-	38	112	35	32	14.5	70 ± 0.37	204 ± 0.75	-
YDZ20L-250	3P + N & nbsp; 4P	144 ± 2.0	276 ± 2.6	141 ± 2.0	110 ± 1.75	6	3.5	22	22	330	-	47	112	35	34	17.5	70 ± 0.37	204 ± 0.75	-
YDZ20L-400	3P + N & nbsp; 4P	206 ± 2.3	360 ± 2.85	149 ± 2.0	117 ± 1.75	4.5	3.5	39	39	472	442	37.5	110	51	52	30	102 ± 0.435	324 ± 0.70	-
YDZ20L-630	3P + N & nbsp; 4P	280 ± 2.6	360 ± 2.85	149 ± 2.0	116 ± 1.75	4.5	3.5	41	41	460	430	46.5	55	70	59	35	140 ± 0.435	324 ± 0.70	-

Eight, ordering instructions

When ordering indicate the following points:
Product type and name: If YDZ20L MCCB -400/3300
Instantaneous tripping Current Rating: such as 630A.
Breaker attachment names, specifications, combination code, adopted when the undervoltage release and shunt trip, should indicate the operating voltage (or control supply voltage) value;
Poles: 3P + N
Order number: as 380.
Ordering example: YDZ20L -400/3300,4P, AC380V, 400A, 350 只.