Multi functional power instrument for the power system of the oil refinery

Multi functional power instrument for the power system of the oil refinery

Johnson Company renovates the power monitoring system for a well-known oil refining enterprise

The multifunctional power meter products produced by Johnson&Johnson for the oil refinery power system have the following characteristics:

1Johnson Intelligent Multi functional Power MeterLEDThe display screen adopts a high brightness color screen mold for direct displayU、V、A、KW、Kvar、PF、Hz,Intuitive and clear, easy to understand.

2The sampling current transformer adopts a high-precision specialized electric metering transformer and is flame retardantPBTThe material and wire are made of multi strand soft copper wire, with a flame retardant rating of level one.

3All electronic components such as resistors and capacitors are made of pure imported products (such as Murata from Japan, Kuroko from Japan, Guoju, etc.), and are made of fully automatic imported Wuxi surface mount technology.

4Johnson Smart Instrument adopts switch power supply, wide voltage AC/DC universal, and adds high-voltage capacitors and mode inductors at the power input end to filter out harmonic interference to the power grid, which is in line withEMCElectromagnetic compatibility requirements, domestic products generally do not have certain functions.

5In addition to industrial grade varistors for power supply withstand protection, Johnson's multifunctional power instrument power input terminals are also equipped with self recovering fast fuses produced by Tyco Electronics in the United States for source shock protection, ensuring stable use of multifunctional power instruments.

6All sockets, pins, terminal sockets, and terminals are made of all copper material, with secure and stable quality.

7The communication module adopts high-voltage optocoupler, and the industrial grade communication chip is separately isolated from the power supply for fast communication speed and stable disconnection.

8The overall instrument casing adoptsABSMade of flame-retardant materials, beautiful and elegant.

Product performance and parameter introduction:

External dimensions

Type 96: Frame (mm): 72 * 72 Hole (mm) 67 * 67 Depth (mm) 62

Parameter function

Basic functions: three-phase I, U, Kw, Kvar, Kwh, Kvar, Hz, cos φ, RS485/Modbus, LED display

Extended functions: 2DI (K), 1DO (O)

Compliant with standards

GB/T 13729_2002 Remote Terminal Equipment
IEC61000-4-2:1995 Electrostatic discharge immunity test level 3
IEC61000-4-4:1995 Electrical fast transient burst immunity test level 3
IEC61000-4-5:1995 Surge Immunity Test Level 3

operation parameters

Working power supply: 85VAC~265VAC/85VDC~265VDC, power consumption<>
Analog sampling rate: 64 points per cycle
Supporting wiring methods: three-phase four wire system 3CT, 1CT and three-phase three wire system 3CT, 2CT, 1CT
RS485 communication: Supports Modbus protocol, communication rate (60012002400480096019200), maximum node capacity of 32
Communication response time: 20ms (9600bps)
Operating environment: -20 ℃~60 ℃

Humidity: 95% without condensation
Insulation complies with DL478, vibration complies with GB7261-87, and anti-interference complies with GB6162
Protection level: Panel IP54, Shell IP20
Weight: 0.5Kg
Tracking frequency range: 45~65Hz (resolution: 0.02Hz)
Accuracy: The acquisition part (U, I) is at level 0.2, and the calculation part (P, Q, S) is at level 0.5; (Please specify when ordering at level 0.2)
PT frequency input: 220V on the secondary side or standard 100V (input continuously overloaded to 1.25 times the rated value)
Primary side 100V~35000V
CT rated input: 5A/1A