Power meter for direct current complete with power supply unit
KET-M is a DC-301 Direct Current energy analyzer unit with built-in 6 digit display and programming push-button, particularly indicated for DC current, voltage, power and energy metering. Direct connection up to 20 A and with external shunt up to 1000 A. Moreover the unit is provided with an auxiliary serial communication bus which is connected to the VMU-X unit so to provide an RS485 communication port. Housing for DIN-rail mounting, IP40 (front) protection degree.
KET-MDC-301 can be connected to the Master ModBUS wireless KET-RMB-211 or directly to the Gateway X-Monitor.
GENERAL SPECIFICATIONS
| Protection Range | Front: IP40; Screw Terminals: IP20 |
| Operative Temperature | -25 ÷ +55 °C |
| Storage Temperature | -30 ÷ +70 °C |
| Relative Humidity | MAX 90% not condensing |
CASE
| Dimensions | 35 x 90 x 67 mm (W x H x D) |
| Mounting | DIN-rail |
| Required DIN modules | 2 DIN modules |
| Electric Board Type | Industrial or switchboard |
| Material | Noryl, self extinguishing: UL 94 V-O |
POWER SUPPLY
| Supply Voltage | 38 ÷ 265 VAC / VDC (45-65 Hz) |
| Consumption | <= 1.5 W; <= 3 VA |
| Connectors types | Screws terminal: min. 2.5 mm², max 6 mm² in case of flexible wire, Max. 10 mm² in case of rigid wire. Min./Max. screws tightening torque: 0.5 Nm / 1.1 Nm |
POWER METER
| Insertion Types | 3/4 wires depending on the type of connection |
| Connection | Direct or external shunt |
| Maximum Rated Current | Continuous up to 20 A for 1s, external shunt up to 1000 A |
| Accuracy | ±0.5 RDG |
| Connections | Screw 1.5 mm². Tightening torque: 0.4 Nm / 0.8 Nm |
| ESD Protection | 4 kV |
| Configuration | By keyboard |
RS485 INTERFACE
| Supported Protocols | ModBUS RTU |
| Communication Rate | Max 115 Kbps |
| Isolation | Class III |
| Connectors types | Screw terminal |
DIGITAL INPUTS
| Channels | 1 Selectable either for pulse transmission proportional to the energy being measured or for alarm control on selected variable |
| Digital Inputs | Static type: opto-mosfet. load Von 2.5 VAC/DC max 70 mA, Voff 260 VAC/DC max |
CURRENT AND VOLTAGE INPUT
| Voltage Inputs | 500 V |
| Current Inputs | Direct 20 ADC, External Shunt 10 VDC, DC External Sensor 50 VDC |
CERTIFICATIONS
| Approvals | CE, cULus listed |
| Security | EN61000-6-2, EN61000-4-2, EN61000-4-3, EN61000-4-4, EN61000-4-6, EN61000-4-5, EN61000-6-3 |
| Metrology | IEC60664, IEC61010-1 EN60664 |
Direct Current Measurement
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