CMR compact modular recloser

Learn how Siemens CMR compact modular recloser can help with wildfire mitigation

17.5-38 kV

Rated short-time withstand current up to 12.5 kA up to 27 kV; 6.3 kA for 38 kV
Rated continuous current up to 630 A
Lightning impulse (BIL) up to 170 kV

CMR compact modular recloser

Installing CMR compact modular recloser onto crossarm

Securing CMR compact modular recloser with crossarm clamp

Inspecting CMR compact modular recloser installation

CMR compact modular recloser typical crossarm installation with wildlife guard

CMR compact modular recloser integrated fault passage indicator

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 38 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^TM compact modular recloser.

CMR multi-phase teaser

CMR 38 kV teaser

Compact Modular Recloser (CMR) - A new class of single-phase recloser

Compact Modular Recloser (CMR) - Typical crossarm installation

CMR compact modular recloser

CMR multi-phase teaser

CMR 38 kV teaser

Compact Modular Recloser (CMR) - A new class of single-phase recloser

Compact Modular Recloser (CMR) - Typical crossarm installation

CMR compact modular recloser

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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 38 kV and the prospective short-circuit level is less than 12.5 kA up to 27 kV or 6.3 kA at 38 kV, 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.

Pend Oreille Public Utility District installation of B-2 recloser/regulator bypass and CMR compact modular recloser on crossarm

CMR is configurable as single- or three-phase recloser

Easy visible indication with B-2 disconnect switch

Ratings:

Voltage ratings of 17.5 kV, 27 kV, or 38 kV
Rated short-time withstand current of 12.5 kA up to 27 kV and 6.3 kA for 38 kV
Rated continuous current of 630 A
Lightning impulses (BIL) of 110 kV, 125 kV, 150 kV, or 170 kV.

Rating description	Model	Model¹	Model¹	Model¹
Rated maximum voltage	17.5 kV	27 kV	27 kV	38 kV
Rated power-frequency withstand – dry	50 kV	60 kV	60 kV	70 kV
Rated impulse-withstand voltage	110 kV	125 kV	150 kV	170 kV

Switch unit parameters	Rating
Rated frequency	50/60 Hz
Rated continuous current	630 A
Rated short-time withstand current	12.5 kA up to 27 kV; 6.3 kA for 38 kV
Rated peak-withstand current	32.5 kA up to 27 kV; 16.4 kA for 38 kV
Rated duration of short circuit	3 s
Rated symmetrical interrupting current	12.5 kA up to 27 kV; 6.3 kA for 38 kV
Rated symmetrical fault-making current	12.5 kA up to 27 kV; 6.3 kA for 38 kV
Rated operating sequence	O – 0.3 s – CO – 2 s – CO – 2 s – CO
Clearing time	<50 ms
Rated line-charging interrupting current	5 A
Rated cable-charging interrupting current	25 A up to 27 kV; 40 A for 38 kV
Minimum number of operations at rated short-circuit current	70 up to 27 kV; 240 for 38 kV
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).

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