MODEL: L53U

L53U SPECIFICATIONS

ES-1958 Rev.13 Page 3/9

https://www.m-system.co.jp/

Pulse rate selectable within

0.1 – 10 000.0 kWh/p, kvarh/p, kVAh/p

INSTALLATION

Power consumption

•AC: < 10 VA

•DC: < 3 W

Operating temperature: -10 to +55°C (14 to 131°F)

Operating humidity: 30 to 90 %RH (non-condensing)

Mounting: DIN rail

Weight: 320 g (0.71 lb)

PERFORMANCE

Accuracy (at 23°C ±10°C or 73.4°F ±18°F, 45 – 65 Hz)

Power factor: ±0.5 %

Analog output: Accuracy of assigned measurand or ±0.2 %,

whichever is greater.

*1. Percentage of the spans:

480 V for voltage;

1 A or 5 A for current; and

4155 W (5 A) or 831 W (1 A) for active power

The described accuracy levels are ensured at the input 1 %

or more for phase 2 current with 3-phase/3-wire unbalanced

load, for neutral current with 3-phase/4-wire unbalanced

load, and neutral current with 1-phase/3-wire.

*2. Accuracy level:

Active energy class 0.5S according to IEC 62053-22

(Reactive energy class 2 according to IEC 62053-23)

Sampling rate: 64 samples per cycle

Data update period:

Harmonic contents and frequency: ≤ 1.1 sec.

Other: ≤ 600 msec.

Response time: ≤ 2 sec. (0 – 99 %),

≤ 3 sec. for frequency and harmonic contents

Insulation resistance: ≥ 100 MΩ with 500 V DC

Dielectric strength:

4000 V AC @1 minute

(voltage input or current input or discrete input or discrete

output or Modbus or configurator jack or analog output to

auxiliary power)

2500 V AC @1 minute

(voltage input to current input to discrete input to discrete

output to Modbus or configurator jack or analog output)

STANDARDS & APPROVALS

EU conformity:

EMC Directive

EMI EN 61000-6-4

EMS EN 61000-6-2

Low Voltage Directive

EN 61010-1

Measurement Category III (input) (Measurement Category

II if the auxiliary power supply code is R)

Measurement Category II (output)

Installation Category II (auxiliary power)

Pollution Degree 2

Input to auxiliary power: Reinforced insulation (550 V)

Output to auxiliary power: Reinforced insulation (300 V)

Input to output: Basic insulation (550 V)

RoHS Directive