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Reclosers

VSO three-phase recloser

Eaton's Cooper Power series VSO recloser features three vacuum interrupters, oil insulation and an operating mechanism in an integral mounting frame. The electronic control is housed in a separate cabinet. Constructed of welded angle- and channel steel, the VSO recloser frame facilitates recloser handling, simplifies mounting procedures and adds rigidity to the mounting structure. It provides a convenient mounting location for the tank-lifting windlass, which allows easy access to the interior of the recloser whether it is mounted on the pole or in the substation.

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Vacuum interruption
Extended maintenance intervals
High continuous current rating
Substation or main feeder protection applications
Form 4D or Form 6 recloser control
Coordination flexibility

Core features

  • High continuous current rating and a high fault-current-clearing capability make the VSO recloser an ideal selection for substation or main feeder protection applications
  • High reliability resulting from the application of time-tested vacuum interruption and control technologies to this higher-rated recloser
  • Extended maintenance intervals with long-life maintenance-free vacuum interrupters that eliminate oil contamination from arcing by-products
  • Simplified coordination with the Form 4D recloser control, or enhanced coordination flexibility with the Form 6 recloser control
  • Rating of 560 amps maximum continuous current (extendable to 800 amps with an accessory) and 12000 or 16000 symmetrical amps maximum interrupting current at a maximum voltage of 38 kV
 

Recloser control coordination options

Type VSO recloser is electronically controlled by an Eaton’s Cooper Power series recloser control. A choice of two controls can be used in conjunction with this recloser. Use the Form 4D control for simplified coordination or the Form 6 control for enhanced coordination flexibility.

Windlass accessory for personnel efficiency

One person can easily lower and raise the oil-filled tank with the windlass accessory, which is usable with pole-mounted or substation-mounted VSO reclosers. The windlass features a 30-to-1 ratio worm-and-pinion gear box that minimizes cranking effort and holds the tank stationary any time cranking is stopped and the operator’s hand is removed from the crank. A shear pin connects the crank to the gear box shaft to guard against overstressing the mechanism when the tank is fully raised. Supplied partly assembled to newly ordered VSO reclosers, the windlass accessory can also be ordered separately for addition to reclosers in the field.
Specifications

Standards

Eaton's Cooper Power series reclosers are designed and tested in accordance with the following ANSI standards: C37.60 and C37.85 and ANSI Guide C37.61

Ratings

Nominal system voltage (kV rms)
 34.5
Rated maximum voltage (kV rms)
 38
Rated impulse withstand voltage BIL) (kV crest)
 150
60 Hz withstand voltage (kV rms)
 dry, one minute
 70
wet, 10 seconds
 60
Maximum Radio influence
 @ 23 kV (uV)
 100
Maximum continuous current (amps) 
 560*
Interrupting current (rms sym. amps) 
 VSO 12
 12000
VSO 16
 16000
Three-second current, symmetric, A
 VSO 12
 12000
VSO 16
 16000
Momentary current, asymmetric, A VSO 12 20000
VSO 16 25600
Cable charging current, A 5
Magnetizing current, A 19.6
*An 800 A accessory is available

Duty cycle

Percent of maximum circuit interrupting rating
 Maximum X/R ratio
 Number of unit operations
15-20 4 88
45-55 8 112
90-100 16 32
    Total 232

Auxiliary switch interrupting ratings

Volts
 Inductive ac (amps)
 Non-inductive Ac (amps) 
 Inductive dc (amps)
 Non-inductive dc (amps)
24 –
 –
 15.0 20.0
48 –
 –
 7.5 10.0
120 60 80
 –
 –
125 –
 –
 1.5 2.0
240 30 60 –
 –
250 –
 –
 0.45 0.5

Electrical specifications

Trip solenoid Operating voltage, Vdc 24  
Peak current, A 10.7  
Actuation time, cycles 1  
Close solenoid Operating voltage, Vdc 24  
Peak current, A 10.8  
Actuation time, cycles 2.75  
 
    Standard
 Accessory
Spring charging motor Operating voltage, Vac
 240 120
Voltage range, Vac
 160-257 90-127
Maximum current, RMS, A
 12.9 18
Steady state current, A 
 4.1 9
Motor running time, cycles 
 40 40
       
Sensing current transformers 1000:1  
Maximum arcing time, cycles
 1.0
Interrupting time, cycles 
 2.5

Mechanical specifications

Operating temperature, °C
 Minimum
 -30
Maximum
 +50
Closing mechanism Spring-operated
Opening mechanism
 Spring-operated
Contact gap, mm (in)
 13 (.5)
Close contact travel time, cycles 
 .75
Open contact travel time, cycles
 .5
Allowable contact erosion, mm (in)
 3 (.125)
Opening time, 24 Vdc solenoid, Signal to contact part, msec
 25
Closing time, 24 Vdc solenoid, Signal to contact make, msec
 50
Mechanical life Open-Close, no load, operations
 2500

Options

  • VSO 16,000 amp interrupting
  • Bushing current transformers
    • 600:5 multi-ratio BCTs mounted on bushings 1,3,5
    • 600:5 multi-ratio BCTs mounted on bushings 2,4,6
    • 1200:5 multi-ratio BCTs mounted on bushings 1,3,5
    • 1200:5 multi-ratio BCTs mounted on bushings 2,4,6
  • Three thermal-amp demand meters; five-amp movement/five-amp scale
    • without instantaneous elements
    • with instantaneous elements
  • Vertical rain-tight meter trough; three sockets with circuit closing contacts
    • Meter trough mounting-and-wiring kit for use on substation extension
  • 800-amp continuous current accessory on recloser equipped with accessory BCTs
    • with eyebolt terminals
    • with 1-1/8-inch-12 stud terminals
  • 120-Vac motor operator
  • Potential-type battery charger in operator cabinet
    • 120-Vac
    • 240-Vac
  • External spring-charging accessory
  • External contact-position-indicating accessory
  • Flat-pad terminals
    • on recloser without accessory BCTs
    • on recloser with accessory BCTs
Download Links

Looking for software, firmware and programming information?

You can access software, firmware, and associated documentation when you log into MyEaton by clicking Sign in at the top right of this Eaton.com page.

  1. Log in using your existing MyEaton.com credentials.
    • If you do not have an account, you can also register for an account by clicking Sign in at the top right of this page and then select Request access now.
  2. Once you are logged in, the software, firmware and associated documentation for this product will appear in the below list.
    • Upon sign-in, you may be directed to the MyEaton home page. You will need to navigate back to this page to see the software, firmware and documentation.

Software and firmware download page

  1. Once you are logged into MyEaton, select Tools from the MyEaton menu in the top right of the page. 
  2. You will see a link titled “Power Systems Division software and firmware downloads.” 
  3. This page is a list of all software and firmware that is available for you to download.
  • Recloser general ratings information catalog
    This catalog describes the general ratings and ordering information for Eaton’s Cooper Power series reclosers which are self-contained devices with the necessary intelligence to sense overcurrents to time and interrupt fault currents and to re-energize the line by reclosing automatically.
    (PDF 375 KB , 01/01/2016)
  • VSO three-phase vacuum electronically controlled recloser catalog
    This catalog describes ratings and ordering information for Eaton’s Cooper Power series VSO electronically controlled, oil-insulated vacuum recloser which provides automatic-reclosing overcurrent protection on higher voltage distribution systems including substation or main feeder protection applications.
    (PDF 884 KB , 01/10/2017)
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