LZM-1D type intermediate converterDetailed product description：

Overview
The LZM-1D intermediate converter is an autotransformer winding structure, suitable for bus differential protection and transformer differential protection in power systems. It can effectively compensate for unbalanced currents caused by different current ratios of current transformers, thereby ensuring the normal operation of the protection device.

The LZM-1D type intermediate converter belongs to a decentralized configuration structure (i.e. a group of current transformers are separately configured with a group of intermediate converters according to the required current ratio).

Technical parameters of LZM-1D type step-down series intermediate converter (for decentralized configuration)

current ratio

one point two /1

one point two five /1

one point five /1

two /1

two point zero eight /1

two point three /1

two point three eight six /1

two point five /1

two point six six /1

three /1

three point three three /1

three point seven five /1

four /1

five /1

five point three three /1

six /1

eight /1

Rated primary current (A)

five

five

five

five

five

five

five

five

five

five

five

five

five

five

five

five

five

Rated secondary current (A)

four point one six six

four

three point three three

two point five

two point four

two point one seven five

two point zero nine six

two

one point eight seven five

one point six six seven

one point five

one point three three

one point two five

one

zero point nine three eight

zero point eight three three

zero point six two five

Maximum operating voltage (V)

four hundred and fifteen

Rated frequency (Hz)

fifty

insulation level

Power frequency 3kV, 1min

accuracy level

5P

Rated secondary load (Ω)

1.2(cosφ=0.8)

Accurate limit coefficient

twenty-eight

twenty-nine

thirty-five

forty-one

forty-one

forty-seven

fifty

fifty-two

forty-two

forty-seven

fifty-one

fifty-eight

sixty-three

seventy-six

eighty-four

ninety-five

>100

Converted to the primary side Short circuit impedance (Ω)

.064

.072

.093

.04

.037

.034

.033

.031

.092

.085

.0824

.08

.077

.064

.058

.055

.040

Rated consumption (VA)

one point six

one point eight

two point three two five

one

zero point nine five

zero point eight five

zero point eight two five

zero point seven seven five

two point three

two point one two five

two point zero six

two

one point nine two five

one point six

one point four five

one point three seven five

one

Weight (kg)

nine point six

eight point five

eight

Technical parameters of LZM-1D series boost converter (for decentralized configuration)

current ratio	1/1.25	1/1.33	1/1.5	1/1.67	1/2
Rated primary current (A)	five	five	five	five	five
Rated secondary current (A)	six point two five	six point six seven	seven point five	eight point three three	ten
Maximum operating voltage (V)	four hundred and fifteen
Rated frequency (Hz)	fifty
insulation level	Power frequency 3kV, 1min
accuracy level	5P
Rated secondary load (Ω)	1.2(cosφ=0.8)
Accurate limit coefficient	twenty-one	nineteen	fifteen	thirteen	nine
Converted to the short-circuit impedance on the primary side (Ω)	zero point one one six	zero point one one four	zero point one eight six	zero point two five two	zero point three six six
Rated consumption (VA)	two point nine	three point six	four point six five	six point three	nine point one five
Weight (kg)	twelve