### What is the maximum flux density of a 250 kVA transformer?

The maximum flux density in the core of a 250/3000 V, 50 Hz, 1-Φ transformer is 1.2 Wb/m2.If the emf/turn is 8 V, determine the primary &amp; secondary turns. A 25-kVA transformer has 500 turns on the primary &amp; 100 turns on the secondary winding.

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### What is the efficiency of a 400 kVA single phase transformer?

The efficiency of a 400 kVA, single – phase transformer is 98.77% when delivering full – load at 0.8 p.f. lagging and 99.13% at half full – load at unity p.f. Calculate (i) Iron loss and (ii) Full – load copper loss. UNIT-III INDUCTION MOTORS PART-A

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### What is the required voltage ratio in a 150kva 50 Hz transformer?

The required N.L voltage ratio in a 150kVA, 50 Hz 1-Φ transformer is 5000 / 250V. Find the number of turns in each winding for a maximum core flux of 0.06 Wb &amp; efficiency at half rated KVA, u.p.f.

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### What is the secondary voltage of a 1-φ transformer?

The voltage/turn of a 1-Φ transformer is 1.1V, when the primary winding is connected to a 220V, 50Hz ac supply, the secondary voltage is found to be 660V.Find (1) Primary &amp; secondary currents (2) the core area if the maximum flux density is 1.2 T.

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doc for "square d 150 kva transformer".(Page 1 of about 16 results)

# "square d 150 kva transformer"

## Low voltage transformers - Fontana Unified School District

Transformers shall be self-cooled type with 220 degrees C. insulation and a maximum temperature rise of 150 degrees C. under continuous full load conditions with an ambient of 40 …

The plant load is 400 kVA. Compare the transformer losses when single transformer is operation and when both transformers are in parallel operation. losses when single transformer is …

## United Nations Development Programme

The material shall be subjected to. inspection and test by our inspectors or international inspector any time during manufacture

## IEEE Standards - draft standard template

Table 10-10—Liquid-immersed and dry-type transformer standard base kVA ratings. ... For instance, a 115 °C transformer has a life expectancy about ten times greater than that of a 150 …

## AC 150/5345-10G, Specification For Constant Current …

CCR oil immersed transformer enclosures must allow no seepage of oil from welds, gaskets, seals, or vents. Oil immersed transformer enclosures must be equipped with a sampling/drain …

## PSG Section 16461 - Eaton

Transformer ratings including: kVA. Primary and secondary voltage. Taps. Design impedance. Insulation class and temperature rise. Sound level. ... 0 to 9 kVA 40 dB 10 to 50 kVA 45 dB 51 …

## PSG Section 16461 - Eaton

Transformer must bear the UL Energy Efficiency Verification Mark to confirm that the unit meets the requirements of 10 CFR Part 431. ... 5-45 kVA minimum of 200 degrees C insulation system with [80] [115] [130] [150] degree C rise; 50 kVA and above: minimum of 220 degrees C insulation system with [80] [130] [115] [150] degree C rise, ventilated ...

## PRODUCT SPECIFICATION FOR A 15 TO 500 KVA, - Online …

The transformer shall be designed for a maximum temperature rise of 150° C above 40° C ambient, as measured. by the rise change or resistance method. The maximum temperature …

## 1 .

The daily variation of load on a 100 KVA transformer is as follows: 8:00 AM to 1:00 PM ----- 65 KW,45 KVAR 1:00 PM to 6:00 PM ----- 80 KW,50 KVAR ... Determine the all-day efficiency of the …

## SECTION 16326000 - ABB

The average temperature rise of the transformer windings shall be rated at (80°C, 115°C, 150°C) and shall be built utilizing Class 220°C insulations, regardless of the temperature rise specified. …

## Www.etenders.gov.za

KVA : TRANSFORMER: S AND MINI SUBS: OF VARIOUS SIZES: A: T ESKOM : SITE: S: IN GAUTENG: JOHANNESBURG ZONE: FOR : 12: MONTHS: CONTRACT: ENQUIRY NUMBER: MWP …

## QUESTION BANK - Department of ECE

The maximum efficiency of 50 KVA transformer is 97.4% and occurs at 90% of the full-load. Calculate the efficiency of transformer at ... square of supply voltage D) all of the above. 17. …

## Medium Voltage Metal-Clad Switchgear Specification - ABB

The circuit breaker door must be provided with impact resistant lexan viewing window of at least 86 square inches and ½” thick to determine breaker position, open/closed indicator, spring …

## UNIT – I

A 5-kVA transformer has iron loss &amp; copper loss of 100 &amp; 200W respectively. Determine the efficiency at half F.L &amp; 0.8 power factor lagging. The efficiency of a 400 kVA, single – phase …

## SECTION 261213 - LIQUID-FILLED MEDIUM-VOLTAGE …

Square D. LIQUID-FILLED POWER TRANSFORMERS. Liquid-filled Transformers: ANSI C57.12.00; three-phase, self-cooled transformer unit. Capacity: [_____] kVA. Primary Voltage: 12.47 kV, …

## SECTION 262313 - PARALLELING LOW-VOLTAGE SWITCHGEAR

Control Power Supply: Control power transformer supplies 120-V control circuits through secondary disconnect devices. Include the following features: Dry-type transformers, in …