NEW Solutions for Underground System Growth
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1 NEW Solutions for Underground System Growth Cooper s Single-Phase Voltage Regulator Improved Power Quality More Economical Improved System Reliability Increased Safety Better Aesthetics Lower Maintenance
2 URD Voltage Regulation with Fewer Problems Now you can add a new dimension to underground system planning and design. Cooper Power Systems pad-mounted voltage regulators give you new freedom in improving safety, reliability and power quality in existing and new underground systems. The pad-mounted voltage regulator helps reduce installation costs, and preserves a more aesthetically pleasing environment. Substation designers now have a full complement of product to install a complete, modular pad-mounted substation. Safety and reliability are enhanced, construction costs are reduced, land requirements are smaller, and the physical profile presented to the public is smaller and more attractive. Traditional methods of applying voltage regulation to 200 and 600 ampere URD systems all contain inherent drawbacks. Riser pole installation of regulators requires that a pole location be selected and approved, often a difficult process in congested or residential areas very sensitive to appearances. Exposing the cable to the added risk of lightning surge damage is another drawback, one that could prove to be very expensive in cable and equipment replacement costs. A traditionally designed substation, with the lengthy processes of gaining rights of way, permitting, and expensive construction, proves to be a time-consuming and costly alternative. In contrast, a deadfront, pad-mounted substation with voltage regulation can be designed so that it is easier to site, easier to install and maintain, while also being safer, more reliable and aesthetically pleasing. Three-Phase Transformer Kyle Vacuum Fault Interrupter Switchgear Single-Phase Voltage Regulator Single-Phase Shrubline Transformer Ease of Operation Cooper s single-phase padmounted voltage regulator has all the functionality of the traditional round tank regulators, with the convenience of pad mounting. The control box is mounted on the door of the operational side of the cabinet for easy access. As the operator uses the control, the gauges and the position indicator are in clear view. The junction box has a side door for the operator to access the terminal block for the connections from the oil tank to the control cable. The control is connected from the control box to the junction box with a quickdisconnect control cable, for easy removal. The current transformer is automatically shorted when the cable is removed.
3 Product Scope Volts Amperes kva Bushing BIL , 75, 100, 38, 57, 76, 200 A well , , 152 & 15 kv 200 A insert , 438, 250, 333, 600 A integral bushing , 100, 72, 144, 200 A well & 25 kv 200A insert , 347, 432, 500, 600A , , 667 integral bushing Average winding rise: 65 C Short circuit withstand: twenty-five times rated current for 2 seconds Note: The 125 kv BIL rating is only limited by the bushing, all internal connections are designed and constructed to 150 kv BIL. The 7620 volt units rated 200 amperes or less are available with optional 25 kv class inserts. Voltage Ratings Voltage Available Tap Voltage , 7970, 7620, 7200, 6930, 4800, 4160, , 13800, 13200, 12000, 7970, 7620, 7200, 6930 Note: Each unit is capable of operating at different excitation voltages. Other system voltages, such as 4800 or 2400, are satisfied through the use of the 7620 volt rating and the potential transformer. Substation Distribution Feeders A B C Three-Phase Transformer Single-Phase Voltage Regulator Switchgear Single-Phase Voltage Regulator Single-Phase Transformer
4 Add-Amp The pad-mounted voltage regulator allows increased load carrying capacity at reduced ranges of regulation. The limitation is the bushing interface (marked with the *). Volts Amperes 10% 8.75% 7.50% 6.25% 5% * 200* * 200* 200* 200* * * 600* 600* 600* * 200* 200* 200* * * 600* Bypass Switch Module As with round tank regulators, bypassing a pad-mounted voltage regulator is an option in system operation. Installing or removing the pad-mounted voltage regulator from the circuit is accomplished with a stand-alone bypass switch module. This switch module fits inside the secure pad-mounted regulator cabinet during normal operation. When the regulator needs to be removed for normal servicing, the bypass module provides hot stick operable sectionalizing switches to disconnect the regulator from the system without causing interruption to the downstream load. Bypass Switch Ratings Voltage Current Bushings A wells and 15 kv inserts A integral bushings A integral bushings A wells and 25 kv inserts A integral bushings A integral bushings
5 Standard Features The pad-mounted voltage regulator is delivered fully-equipped, ready for your application: Full metal barrier separating the two compartments Two parking stands Three bushing wells & inserts or 600 A terminations Standard pad-mounted green paint Ground pads Bolted oil tank cover Nameplates (2) Deep (31") removable cabinet Automatic pressure relief device Lifting lugs Under-oil bypass (3 kv) arrester Provisions for pressure/vacuum gauge & thermometer 1" filter press connection and fill plug Control box with control Magnetic oil level and oil sight gauges Junction box and position indicator Optional bypass switch module with sectionalizing switches 1" drain valve with sampler Optional external tap changer for PT taps Optional Accessories Readily available accessories are shown below. Other accessories are available, please consult your Cooper Power Systems Sales Engineer. Bypass switch module Internal differential PT Alternate top coat color Deeper or shallower cabinet External tap changer for PT taps No barrier Dial type liquid level gauge Pressure/vacuum gauge Thermometer Under-oil shunt arresters (10 or 18 kv) Control heater assembly
6 Step-Type Voltage Regulator Specification Scope This specification covers outdoor, pad-mounted, single-phase, oil-immersed, step-type voltage regulators that provide 10% regulation in thirty-two (32) steps of approximately 5/8% each. Ratings The ratings and terminations shall be according to the following table: Voltage Current kva Bushings BIL , 75, 100, 150, , 57, 76, 114, A wells and 15 kv class inserts , 438, , 333, A integral bushings , 100, , 144, A wells and 25 kv class inserts , 347, 400, , 500, 576, A integral bushings 125 The regulator shall be rated for an average winding rise of 65 C rise over a 30 C ambient. The regulator shall be capable of a short circuit withstand of twenty-five times rated current for two seconds. Note: The 125 kv BIL rating is limited by the bushing, all internal connections are designed and constructed to 150 kv BIL. Each unit will be capable of operating at different excitation voltages, with settings below: Voltage Available tap voltage , 7970, 7620, 7200, 6930, 4800, 4160, , 13800, 13200, 12000, 7970, 7620, 7200, 6930 Three bushings shall be provided. The source-load bushing shall be externally grounded. All regulators shall be provided with a 3.0 kv under-oil, metal oxide varistor (MOV) bypass arrester connected across the series winding. The tank and the cabinet shall be Munsell 7GY3.29/1.5 and meet the coating and security requirements of ANSI C The control enclosure shall be mounted on the right-hand compartment door and connected to the junction box with a quick-disconnect cable that automatically shorts the current transformer when the cable is disconnected. The operational (right-hand side) compartment shall be fully separated by a metal barrier from the system voltage (left-hand side) compartment to ensure operational safety conditions. Located in the operational compartment shall be: An oil sight gauge which indicates oil color A magnetic oil level gauge to indicate the oil level at 25 C ambient A 1" drain valve with sampling device A 1" upper filter press connection A tap position indicator mounted inside the cabinet to minimize the incidence of damage Two anodized aluminum laser-etched nameplates, one mounted on the control enclosure and the other mounted on the regulator tank. The nameplates shall have bar coding, in accordance with ANSI C Construction Regulator Control The control panel shall be microprocessor based, have a temperature range of -40 C to +85 C with the following features: Digital metering package of Class 1 accuracy with instantaneous and time/date stamped demand values Voltage limiting capability Voltage reduction capability Reverse power flow capability Tap position tracking The following accessories shall be provided when checked. A bypass switch module which would mount inside the secure cabinet and allow the regulator to be removed from service without interrupting the continuity of the system. A (source-to-load) differential PT to provide complete operation and metering under reverse power flow conditions. A thermostatically-controlled heater assembly to reduce moisture in areas of high humidity. The heater assembly shall include an ON-OFF switch. In the ON position, a thermostat in the heater assembly shall activate the heater at approximately 30 C (85 F) and turn it off at approximately 40 C (100 F). Bulletin Number Cooper Power Systems, Inc. Cooper Power Systems 2300 Badger Drive Waukesha, WI Fax:
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