Kuhlman PS–981/PH–982 Current Transformer

Manufacturer: Kuhlman

The core and coil assembly is wound and encapsulated in a molded cast resin with various window sizes from 6” up to 44”.

The secondary terminals are ¼”-20 studs with associated hardware located inside a removable terminal box with two (2) 1” NPT conduit hubs.

The PS-981 can provide up to a 0.3 Class accuracy for metering with burdens of B0.1 to B1.8 and up to C800 for some relay applications (see specifi c ratings on pages 8-13). The transformer is accurate through its Rating Factor, and can be used continuously to this level. The PH-982 will operate with 0.15 Class accuracy for metering with burdens of B0.1 to B1.8 (see specifi c ratings on page 14). The transformer is accurate through its Rating Factor, and can be used continuously to this level.

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Features Applications Model

MOUNTING RESIN PADS - 3 ½” diameter by ¼“ thick resin pads can be adhered to the CT bottom to prevent water welling with the CT placed directly onto the unit surface. This is the easiest to install and is the suggested method for CT application to flat surfaces with no obstructions. If a ground shield is used, it can be fastened to the CT top with silicone RTV adhesive.
UNIVERSAL MOUNTING BRACKETS - Top and bottom clamps hold the CT while the threaded support bolts provide vertical adjustment.
The threaded bolts can be tack welded to the electrical equipment cover. This is the most commonly used mounting method since it provides obstruction clearance and can be used on fl at or radial surfaces and vertical or angled bushings. If a ground shield is used, it can be secured by the top brackets.
CUSTOM “Z” BRACKETS - “Z” brackets can be used on bushings, cable terminators (potheads) and other applications when the other methods are not practical. A special form requires the user to supply data to Kuhlman engineering upon which to design the brackets. It is important that all the required information is supplied. “Z” Brackets can be used on vertical or angled bushings. Top brackets or an RTV adhesive is required when installing a ground shield.

The PS-981 / PH-982 outdoor “Slip-Over” / ACCUSlipTM current transformer is a 600 volt, 10kV BIL rated unit and designed to fit over a variety of specifi ed bushing sizes. This unit can be applied over higher rated system voltages provided suffi cient insulation is available on the point of application. Primary current ratios are available from 200:5 to 5000:5 at 60 Hertz (Hz) with a Rating Factor of up to 4.0. This unit is ideal for old electrical substation equipment with no internal space for BCT’s. This dry-type, solidcast CT will operate with high accuracy for metering or relay applications.

Mfr. Part No.	Description
P061645S5005020	Current Ratio, 50:5
P031845S5005020	Current Ratio, 50:5
P0102045S5005020	Current Ratio, 50:5
P0122245S5005020	Current Ratio, 50:5
P061675S5005050	Current Ratio, 50:5
P031875S5005050	Current Ratio, 50:5
P0102075S5005050	Current Ratio, 50:5
P0122275S5005050	Current Ratio, 50:5
P061645S1015050	Current Ratio, 100:5
P031845S1015050	Current Ratio, 100:5
P102045S1015050	Current Ratio, 100:5
P122245S1015050	Current Ratio, 100:5
P061675S1015100	Current Ratio, 100:5
P031875S1015100	Current Ratio, 100:5
P102075S1015100	Current Ratio, 100:5
P122275S1015100	Current Ratio, 100:5
P061635S2015050	Current Ratio, 200:5
P031835S2015050	Current Ratio, 200:5
P102035S2015050	Current Ratio, 200:5
P122235S2015050	Current Ratio, 200:5
P061645S2015100	Current Ratio, 200:5

Kuhlman PS–981/PH–982 Current Transformer

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