RDM8HU MCCB

RDM8H series high voltage molded case circuit breaker (hereinafter referred to as circuit breaker).
The circuit breaker is suitable for AC 50/60Hz distribution networks with a rated insulation voltage of 1500V, a rated operational voltage of 1140V and below, and a rated current of up to 800A.
It is used to distribute power and protect lines and power equipment from overload, short circuit, and undervoltage faults. For circuit breakers with a rated current of 630A and below, they can also be used to protect motors.
Under normal circumstances, the circuit breaker can distribute power and provide overload, short circuit, and undervoltage protection for lines and power equipment. When used to protect motors in distribution networks, it can break the circuit of squirrel-cage motors during starting and running, and protect them against overload, short circuit, and undervoltage.
The circuit breaker can be installed vertically (i.e., upright) or horizontally (i.e., horizontal).
It is suitable for isolation, symbolized as “I-”.
Product standards:
• IEC 60947-1
• IEC 60947-2
• GB/T 14048.1 Low-voltage switchgear and control equipment – Part 1: General
• GB/T 14048.2 Low-voltage switchgear and control equipment – Part 2: Circuit

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Product Detail

Selection guide

RDM8HU	400	M	P	3	3	10	AC1140V	125A	AC230V	Board front connection
Product code	Shell level	Breaking ability level	operating mode	Number of poles	Trip mode	Accessory	Rated voltage	Rated current	Accessory voltage	Installation wiring mode
High voltage molded case circuit breaker	250(63~250) 315(280~315) 400(250~400) 630(400~630) 800(630~800)	M: Higher fracture type H: High segment type	Nocode:Direct handle operation P:electrical operation Z:Turn the handle to operate	3:3 poles	2:Single magnetic type 3:Thermo magnetic type	00: No accessories 08: Alarm contact 10: Shunt release 18: Shunt release, alarm contact 20: auxiliary contact 02: auxiliary contact 28: auxiliary contact, alarm contact 40: Shunt release, auxiliary contact 12: Shunt release, auxiliary contact 48: Shunt release, auxiliary contact alarm contact 60: two sets of auxiliary contacts 68: Double auxiliary contact,alarm contact	AC800V AC1000V AC1140V	63、80、100、125、140、160、180、200、225、250、280、300、315、350、400、500、630、700、800	Shunt release DC24V、AC230V、AC400V	Board front connection (No code) Backboard connection

Normal working conditions and installation conditions

The altitude of the installation site does not exceed 2000m;

Allow the ambient temperature is not higher than +40 C, not lower than -5'C,(Over +40C capacity reduction, specific consultation with the manufacturer)。

Atmospheric conditions: When the ambient temperature is 40 ℃C, the relative humidity of the atmosphere does not exceed 50%, and a higherrelative humidity is allowed at a lower temperature, such as 90% at 20 ℃, and considering the condensation that occurs on the surface of the product due to temperature changes;

The pollution level:level 3;

lnstallation category:Ⅱ;

The magnetic field of the installation position should not exceed 5 times the geomagnetic field in any direction;

In a medium that is not at risk of explosion, and in which there is no gas or conductive dust sufficient to corode metal and destroy insulation;口No erosion from wind and snow;
Can be installed horizontally and vertically;

There should be no significant impact and vibration at the installation place, and it should not be installed in flammable and explosive places.

Main technical parameter

Model		RDM8HU
Specification		250	315	400	630		800
Number of pole		3
Breaking ability level		M、H
Rated current In(A)		63、80、100125、140、160 200、225、250	280、300 315	250、315350、400	400、500 630		630、700 800
Rated insulation voltage Ui(V)		1500		1500
Rated impulse withstand voltage Uimp(kV)		12		12
Rated operational voltage Ue(V)		AC800、1000、1140
Arcing distance(mm)		+50(0)		+100(0)
Rated limit short-circuit breaking capacityIcu(kA)	AC800V	M:36.5	H:50	M:36.5		H:50
	AC1000V	M:20	H:20	M:20		H:20
	AC1140V	M:10	H:15	M:10		H:15
ated operating short- circuit breaking capacity Ics(kA	AC800V	M:25	H:35	M:25		H:37.5
	AC1000V	M:12	H:15	M:12		H:15
	AC1140V	M:10	H:15	M:10		H:15
Electrical life(times)		1500	1000	1000	800		500
Mechanicallife(times)²	Maintenance free	10000	10000	7000	7000		7000
	Maintenance required	15000	5000	10000	10000		10000
Outline dimension(lengthxwidthxheight)		288×107×135		320×182×156
Reference ambient temperature℃		40

The over-current trip device consists of a thermal long-delay trip device with inverse time-Iimitcharacteristics and an instantaneous
electromagnetic trip device, whose operating characteristics are shown in Table5.

Distribution circuit				Circuit breakers for protecting motors
Rated current In(A)	thermal overload release		Electromagnetic trip operating current(A)	Rated current In(A)	thermal overload release		Electromagnetic trip operating current(A)
	1.05Inconvention al non-tripping time(h)(cold)	1.30Inconvention al non-tripping time(h)(thermal)			1.0Inconvention al non-tripping time(h)(cold)	1.2Inconventional tripping current(h)(cold)
63<In≤125	2	2	10In±20%	63≤In≤630	2	2	12In±20%
125<In≤800	2	2	5In±20% 10ln±20%

Outline and Installation dimension

Type specification	Outline dimension(mm)								Installation dimension(mm)
Type specification	L	W	H	L1	L2	W1	H1	H2	a	b	4-Qd
RDM8HU-250/3RDM8HU-315/3	200	107	135	10.5	9.5	22	98	26	35	164	4.5
RDM8HU-400/3RDM8HU-630/3 RDM8HU-800/3	270	182	156	18	18	41	118	29	58	200	7