////// TRACTION POWER SYSTEMS

EFFICIENT-REC-C

Controlled rectifiers

EFFICIENT-REC-C / CoNTRollEd RECTIFIERs2

GENERAL INFORMATIONWith many years of experience in traction rectifiers, sécheron is able to offer a reliable and suitable range of controlled rectifiers for dC traction power supply and industrial applications. our natural air cooled rectifiers are equipped with thyristors with a high overload capacity and a high blocking voltage.

design of the rectifiers is based on ideally sized and proven semi-conductors (thyristors) offering particularly high performances and reliability. Rectifiers are designed in accordance with customer specifications and International, European and American standards.

Thanks to its complete range of rated voltages, sécheron controlled rectifier products cover most of the worldwide transit authority networks.

MAIN BENEFITSMAIN BENEFITS D Regulation of the voltage of the line in order to compensate voltage drops.

D Compact and robust design.

D Adaptability: Power connection from either the top or the bottom of the cubicle.

D Ease of access for easy maintenance of components.

D Natural air cooling.

D High efficiency.

D optimization of the operation in case of double converter (controlled rectifier coupled with inverter).

750

0 1.5 2.5 5 6

1500

UN [VDC]

P [MW]

Customizedsolutions

TramwayTrolleybus

LRTAPMMonorail Subway

Commuter trainsMain line railwaysSubway

LRTMonorail

Customizedsolutions

The controlled rectifier has two control mode:

• Static drop voltage control: The firing angle is fixed and the voltage-current characteristic of the rectifier follows the characteristics of a non-controlled diode rectifier. The dC output voltage decreases with current by inductive and resistive voltage drops.

• Dynamic voltage control: The firing angle is regulated at any time to maintain the dC output voltage at a defined level. The voltage regulation compensated the inductive and resistive voltage drops up to 150% overload current in highly dynamic manner.

Control areaVoltage control

Max. continuous voltage of line

α = 10°α = 16.3°

α = 24.2°

α = 34°α = 29.3°

α = 26.3°

900 V

825 V

750 V

IdN 1.5 x IdN 3 x IdN

Example of output characteristicof controlled rectifier 750 V

EFFICIENT-REC-C / CoNTRollEd RECTIFIERs 3

CONTROLLED RECTIFIER RANGEStandard controlled rectifier range

Rated dC voltage [V] 750 1500 3000

Rated current [A] Up to 6000 Up to 4000 Up to 3000

overload category Class VI (according to IEC 60146-1-1)Nema RI-9 (according to IEEE 1653.2)

Peak inverse of thyristor [V] 2400-2800 4900-5200 4900-5200

Efficiency [%] 99.5

Max. ambient temperature [°C] 40 (without derating)

Max. altitude [m] 1000 (without derating)

IP degree IP2x (without derating) / IP3x (with derating)

Width [mm] 1600 to 4000

depth [mm] 1400

Height [mm] 2200

PROTECTIONSOVERVOLTAGE PROTECTION

CONNECTIONS

SHORT-CIRCUIT PROTECTION

• Internal overvoltage: during turn-off, the load current of the thyristor does not stop flowing immediately but continues briefly in reverse direction as reverse recovery current. This peak reverse recovery current causes a voltage peak which is eliminated by an individual snubber circuit mounted in parallel with each thyristor.

• External overvoltage: The external overvoltage is essentially due to lightening strikes on the line and to short-circuits. The rectifier is equipped on the dC side of a RC filter capable of absorbing a significant surge. A surge arrester can optionally be installed directly between the output terminals of the rectifier.

All controlled rectifiers are designed to withstand external short circuit without damage until the MV circuit-breaker opens.

• Rectifiers with fuses (Np): Composed of several parallel thyristors on each branch, the failed thyristor will be isolated from the circuit by melting the associated fuse, witnessed by the fuses own micro-contact. After melting the fuse, the controlled rectifier is withdrawn from operation.

/// 6 PULSES UP To 1500 VdC(connection n°8 according to IEC 60146-1-2)

/// 12 PULSES UP To 1500 VdC, with or without IPT(connection n°9 according to IEC 60146-1-2)

IPTin option

Smoothing coilsin option

Smoothing coilin option

Sécheron SA

Rue du Pré-Bouvier 251242 Satigny - Geneva

CH-Switzerland

www.secheron.com

Tel: +41 (0)22 739 41 11Fax: +41 (0)22 739 48 11substations@secheron.com

This document is not contractual and contains information corresponding to the level of technology at the date of printing. Sécheron reserves the right to modify and/or improve the product, whose characteristics are described in these documents, as required by new technology at any time. It is the purchaser’s responsibility to inform himself, no matter what the circumstances, of

the product’s maintenance conditions and requirements. Sécheron reserves all rights, especially those arising from our “General Delivery Conditions”.

Copyright© 2018 Sécheron SA

sG841750BEN_A02-09.18