TECHNICAL DESCRIPTION

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DC Circuit Breaker TECHNICAL DESCRIPTION TRK5650515200 Ed.1 of 21/02/13 CONTENTS 1. INTRODUCTION... 2 2. DESCRIPTION... 2 2.1 Description of circuit breaker... 2 2.2 Operating mode... 2 2.3 Variants and Accessories.

1 DC Circuit Breaker TECHNICAL DESCRIPTION TRK Ed.1 of 21/02/13 CONTENTS 1. INTRODUCTION DESCRIPTION Description of circuit breaker Operating mode Variants and Accessories INTEGRATION CHARACTERISTICS Standards General features Power circuit Breaking capacity Control Circuit Auxiliary contacts DIMENSIONS /8

2 1. INTRODUCTION The ARC 812 and ARC 1512 circuit breakers are direct current unipolar devices with a bi-directional over-current and trip free release. These are electromagnetic control devices. Products from 1200A ARC range have a common general architecture and differ by the size of the arc chute (function of the operating voltage). 2. DESCRIPTION 2.1 Description of circuit breaker The circuit breaker consists of two main part assembly : - the body (also called frame - 1) which is common part of the range - the arc chute (2) with two main versions (for 750V and 1500V applications) ARC Nominal voltage (10 2 V) Nominal current (10 2 A) Fig.1.1 Identification mode Their compactness and ability to operate either vertically or horizontally make the A circuit breakers particularly adaptable to assembly in : Electrical blocks or cases for rolling stock (for horizontal mounting, it is recommended to use horizontal fitting option) Shielded cases of the industrial type cabinets for fixed installations. The circuit breaker design leads to an easy maintenance and high number of operations. The main wearing parts may be changed without completely dismantling the circuit breaker. Fig.2.1 ARC812 circuit breaker (without options) 2.2 Operating mode Mechanical operation Closing The energizing of the electromagnet causes the movement of the main contacts and the movable pole contact comes to the fixed pole contact. Opening by holding current cut off Due to the effect of springs the breaking of the holding current pull the moving pole contact arm to the "open" position. Opening by direct over-current release When the current travelling through the circuit breaker exceeds the release setting threshold, the equilibrium is broken and the movable pole contact arm is pulled back to the "open" position by the effect of return spring. 2/8

Electrical operation During opening the electric arc develops between the contacts and then, under the effect of the magnetic field, progresses onto the horns.

$The arc chute consists of metal plates which are intended to fraction the arc and to develop the back-electromotive force required for its extinction. 2.$ to 90 VDC DTR0000078661 110 V DC 77 V to 137,5 VDC DTR0000078663 Variant 1 : Arc chute The sizes of the 750V and 1500V arc chutes are linked to the number of metal plates in the arc chute.

to 90 VDC DTR0000078661 110 V DC 77 V to 137,5 VDC DTR0000078663 Variant 1 : Arc chute The sizes of the 750V and 1500V arc chutes are linked to the number of metal plates in the arc chute.

3 Electrical operation During opening the electric arc develops between the contacts and then, under the effect of the magnetic field, progresses onto the horns. The arc is forced to enter the arc chute by thermodynamic and magnetic effects. The arc chute consists of metal plates which are intended to fraction the arc and to develop the back-electromotive force required for its extinction. 2.3 Variants and Accessories Battery voltage Input voltage Part number 24 V DC 16,8 V to 30 VDC DTR V DC 24 V to 44 VDC DTR V DC 33,6 V to 60 VDC DTR V DC 50,4 V to 90 VDC DTR V DC 77 V to 137,5 VDC DTR Variant 1 : Arc chute The sizes of the 750V and 1500V arc chutes are linked to the number of metal plates in the arc chute. Recommended accessory : Control panel 750V 1500V Fig.2.4 arc chutes Fig.2.3 ARC812 electronic control panel Its main functions are to provide a pulse current to close the circuit breaker and hold the circuit breaker closed with reduced current. The main advantages are : - energy calibration for closing (mechanical shock limitation during closing for circuit breaker) which leads to increase and control life cycle cost of breaker. - low power dissipation during holding with regulated current (<30W) - wide input battery voltage range condition according to CEI Rated input voltage from 16 to 140VDC safe opening circuit is guaranteed with double system to open current of the coil, either power transistor and electromechanical relay controlled separately. Feedback signals are available for system diagnostic as state of the output and state of electromechanical relay. Covers and lateral seals can be used in option to reduce distances between arc chute and metallic parts (either metallic walls or components). Lateral seals & Covers Onix traction drive fitting 3/8

4 Variant 2 : Tripping range The circuit breaker is equipped with an overcurrent release which is supplied directly by the current in the main circuit of the device. The tripping range is the range between the minimum and maximum values within the current setting of the over-current release can be adjusted. 400 to 800 A 600 to 1200 A 1200 to 2500 A 1800 to 3600 A 3. INTEGRATION The integration of the DC circuit breaker inside a cubicle is an important matter. Attention has to be paid on volume of free air around the product, evacuation of ionized gas and risk of flashover to metal parts. The position of the circuit breaker is also important see pictures 3.1 and 3.2. The electronic panel shall be installed in such a way to prevent any metallic projection from the arc chute. Option : Overcurrent signalling contact An over-current release signalling contact indicates the state of the circuit breaker : when contact is in close state, the circuit breaker is open following an tripping event. Fig.3.1 Recommended assembly positions Fig.3.2 Forbidden assembly positions 4/8

5 4. CHARACTERISTICS 4.1 Standards The HSCB is in compliance with: - IEC : Railway applications Electric equipment for rolling stock - IEC 61373: Railway applications Rolling stock equipment Shock and vibration tests. - IEC 60850: Railway applications Supply voltages of traction systems. - NFF 16101: Fire behaviour Material choice. - NFF 16102: Fire behaviour Material choice and application for electric equipment. - EN : Railway applications Fixed installations D.C. switchgear - EN : Railway applications Electronic equipment used on rolling stock 4.3 Power circuit Features ARC812 ARC1512 Rated operational voltage (Ue) 750V 1500V Rated insulation voltage (Ui) 900V 1800V Exceptional voltage 1000V 1950V Line surges Overvoltage category Pollution degree Dielectric strength between poles (1mn / 50Hz) Dielectric strength between HV and ground/lv (1mn / 50Hz) In accordance with IEC V rms 3875V rms OV3 PD3 4500V rms 5750V rms 4.2 General features Features Min Max Nominal Operating Temperature Tu -25 C +70 C Rated thermal current Overload (from stabilized) Overcurrent tripping device 1200 A (at 55 C) 3500A DC during 60s 4000A DC during 15s Bidirectional internal overcurrent tripping Exceptional Operating Temperature / -25 C +85 C Storage Temperature Ts -40 C +70 C Height Alt 1400m Humidity % 95% at 70 C Mechanical endurance Weight Dimension (mm) HV connections LV connections Shock and vibration Cycles (at 25 C) ARC812 : 29 kg ARC1512 : 37 kg ARC812 : 487x397x150 ARC1512 : 487x532x150 HV input and HV output : 12,5 hole on electrical connection Burndy connector SMS18R1 (Souriau connector as option) IEC standard Category 1, class B 4.4 Breaking capacity Features ARC812 ARC1512 Maximum prospective current (ka) Prospective current (ka) (O-40s-CO-40s-CO) L/R (ms) Voltage (V) Values are given for circuit breaker in all positions with covers and lateral seals. 5/8

6 4.5 Control Circuit 4.7 Wiring diagramm Characteristics of the electronic control panel Designations Voltage variants Overvoltage protection device Insulation voltage between LV contacts and earth Opening time at Un by holding current cut off Minimum time between 2 closing Control Panel Dimensions (mm) Control Panel weight Power HSCB Control panel From 24 V DC to 110 V DC according to EN50155 Yes 1500 V < 15ms 7 s 115 x 295 x kg 5W when open 30W at holding 45W when closing during 7s Auxiliary contacts Designations Typ. Min Max Voltage (AC or DC) 50 V 250 V Current Breaking current 10 ma 2 A cycles under 1A, 90V, L/R=15ms cycles under 1A, 90V, L/R=40ms Fig.4.7 Standard wiring Mechanical endurance Insulation voltage between auxiliary contacts and earth Sequence Cycles 2500 V 4 NO + 4 NC Fig.4.8 Wiring variant with optional overcurrent release signaling contact 6/8

7 5. DIMENSIONS ARC 812 ARC 1512 Minimum distance to metal wall (mm) Minimum distance to insulating wall (mm) A B C A B C Without arc chute option With covers With lateral seals With lateral seals & covers Note: Volume around circuit breaker is not function of distances indicated above. Mixed lines do not represent minimum box volume. Fig.5.1 Dimensions 01 7/8

8 ARC812 Arc chute with covers ARC1512 Arc chute with covers Fig.5.2 Dimensions 02 8/8

TECHNICAL DESCRIPTION

DC Circuit Breaker TECHNICAL DESCRIPTION TRK5650523200 Ed.1 of 23/07/13 CONTENTS 1. INTRODUCTION... 2 2. DESCRIPTION... 2 2.1 Description of circuit breaker... 2 2.2 Operating mode... 2 2.3 Variants and