CMR compact modular recloser

17.5-27 kV

Rated short-time withstand current up to 12.5 kA
Rated continuous current up to 630 A
Lightning impulse (BIL) up to 125 kV

CMR compact modular recloser

As a direct substitute for traditional, single-phase, hydraulic reclosers, the type CMR allows for reduced maintenance with only the rechargeable battery pack having to be replaced. Wireless communications enables in-service reconfiguration and downloading of the event log and load profile.

By eliminating regular maintenance and utilizing line voltage as power supply, the new modular auto-recloser addresses common problems of obsolete hydraulic reclosers. The compact recloser is fully rated for voltage systems up to 27 kV and features a complete, insulated housing that covers all live parts. The lightweight device permits easy installation and fast commissioning, plus the ability for wireless firmware and configuration updates.

The CMR conforms to the revelant sections of the following standards: IEC 62271-111 (2012) / IEEE C37.60.

Watch the video below to learn more about Siemens CMR compact modular recloser.

CMR compact modular recloser

Application:

Lightweight, reduced-maintenance alternative to hydraulic reclosers.

Fully integrated self-powered system:

Power supply using line voltage
Rechargeable battery for backup power
Magnetic-actuated vacuum interrupter
Integrated protection relay and controller
Flexible mounting options.

Intelligent:

Wireless connectivity
GPS time reference
SCADA capability (future)
Voltage and current measurement
Fault-passage indication (FPI)
Comprehensive event log
Full range of TCC curves.

Compact:

Lightweight 48.5 lbs (22 kg) excluding mounting bracket
Simple and quick to install.

Options:

A range of mounting styles
Factory pre-configuration.

Reliable and reduced maintenance

The CMR auto-recloser is suitable for all sites where the system voltage is less than 27 kV and the prospective shortcircuit level is less than 12.5 kA, even those with inconsistent or no line current. Featuring fully configurable protection and four operations in a sequence, the unit presents the ideal solution for clearing transient faults on long rural distribution lines.

The system design facilitates uninterrupted operation for reliable service. Unlike hydraulic reclosers, the auto-recloser has no need for periodic inspection and maintenance.

Ratings:

Voltage ratings of 17.5 kV or 27 kV
Rated short-time withstand current of 12.5 kA
Rated continuous current of 630 A
Lightning impulses (BIL) of 110 kV or 125 kV.

Rating description	Rating	Model¹
Rated maximum voltage	17.5 kV	27
Rated power-frequency withstand – dry	50 kV	60
Rated impulse-withstand voltage	110 kV	125

Switch unit parameters	Rating
Rated frequency	50/60 Hz
Rated continuous current	630 A
Rated short-time withstand current	12.5 kA
Rated peak-withstand current	32.5 kA
Rated duration of short circuit	3 s
Rated symmetrical interrupting current	12.5 kA
Rated symmetrical fault-making current	12.5 kA
Rated operating sequence	O – 0.3s – CO – 2s – CO – 2s – CO
Clearing time	<50 ms
Rated line-charging interrupting current	5 A
Rated cable-charging interrupting current	25 A
Minimum number of operations at rated short-circuit current	70
Minimum number of load-break operations at rated current/mechanical operations	10,000
IP rating	67

Service environment	Rating
Operating temperature range	-40 to +131 ºF (-40 to +55 ºC)
Humidity	0 to 100%
Maximum altitude	9.843 ft (3,000 m)²
Pollution class	Very heavy

Footnotes:

¹“Correct model must be selected for the applicable system voltage (27 kV model cannot be used on a 12 kV network).

²“Derating required above 3,281 ft (1,000 m).

Downloads

Support

Siemens USA contact us request
For more information, including service or parts, please contact our Customer Support Center by calling phone: +1 (800) 333-7421 or completing the contact us form.