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Summary of Contents for KMB SMC 144
- Page 1 KMB systems, s. r. o. Dr. M. Hor´ a kov´ e 559, 460 06 Liberec 7, Czech Republic Tel. +420 485 130 314, Fax +420 482 736 896 E-mail: kmb@kmb.cz, Web: www.kmb.cz SMC 144 Power Analyzer Operating Manual Version 1.1...
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Page 2: Table Of Contents
2.2.1 Configuring SMC 144 on a PC ....... . . -
Page 3: General Description
General Description The SMC 144 is specially designed for remote monitoring of energy consumption and its quality. The DIN rail display-less design with multiple communication options is suitable for a wide spectrum of automation tasks in modern buildings, remote supervision of the infrastructure and also remote load management. Absence of local panel controls (display and keyboard) limits possibilities for hostile user interaction. - Page 4 Supported Firmware Modules ˆ Modbus Master (MM) — Allows regular data downloads from devices supporting Modbus into its own memory. ˆ General Oscillograms (GO) — Adds a feature that allows recording of raw signal samples. ˆ Ripple Control Signals (RCS) — Allows archiving of RCS datagrams and theirs voltage levels.
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Page 5: Types And Accessories
Types and Accessories The SMC 144 is available in several configurations according to the customer requirements . See the ordering scheme on figure 1. SMC,T44,U,PT--,R,B,E Instrument model SMC,T44,=,Power,analyser,with,internal,memory Auxiliary power supply U,=,75,V,÷,5T-,V c,8-,V,÷,65-,V L,=,O-,V,÷,75,V c,O4,V,÷,48,V Current inputs Snnn,=,with,low,current,output,CTsc,splitxcore, Pnnn,=,with,low,current,output,CTsc,throughxhole NOCT,=,without,current,inputs... -
Page 6: Operating The Meter
fixed baud rate 9600 bps and is listening on address 250. Green LED is fast blinking (once per 400 ms). If SMC 144 do not receive any command until the interval expires, port is reconfigured to parameters previously set by user. SMC 144 is also listening on address set by user — if same baud rate as default is set, it is possible to connect to the device immediately after power-up. - Page 7 If your device is equipped with the Ethernet module, you can switch to a TCP tab and connect with it’s IP address and port 2101 or use Locator function to find all KMB devices connected to a LAN and simply chose the SMC 144 device you want to connect to.
- Page 8 * Multiplier I - The SMC 144 device can be used for direct or indirect measurement. In case of direct current measurement (see figure 4a) set the Multiplier I to 1. In case of indirect current measurement (as on figure 4b) Multiplier I must be set equel to primary current transformer...
- Page 9 · Default Gateway - Setting of default network gateway. · Ports - Setting of ports, on whose the device is listening for communication. Default KMB Long message port is 2101, default Modbus port is 502 and default Web server port is 80. Ev- ery port can be changed to whichever is needed, but don’t forget to change them appropriately...
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Page 10: Installation
You can choose a fixed window (Fixed) or a floating window (Floating). In addition, you can set the length of averaging window. – Input/Output (fig. 5e) - The SMC 144 is always equipped with two alarm LEDs (LED A1, LED A2 ) and optionally one relay or impulse output (O1 ). - Page 11 (b) ENVIS.Daq - instrument configuration (c) ENVIS.Daq - instrument archive configuration (d) ENVIS.Daq - instrument electricity meter configu- ration (e) ENVIS.Daq - instrument I/O configuration (f) ENVIS.Daq - instrument time configu- ration Figure 5: ENVIS.Daq - SMC 144 configuration forms...
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Page 12: Voltage
A connection wire’s maximum cross section area is 2.5 mm in case of all screw terminals. The SMC 144 is primarily intended for DIN-rail mounting. Dimensions of the instrument are on figure 6. There are also positions marked with dash dot lines of holes for wall-mounting with three screws. -
Page 13: Peripherals
fitted with terminating resistance. Digital Inputs (optional) SMC 144 can be optionally equipped with two voltage sensitive digital inputs. It uses three terminals in COM2/DI block — G is common terminal, B/1 is first and A/2 is second digital input. Voltage lower than 3 V applied between G and digital input B/1 or A/2 is evaluated as inactive state, voltage greater than 10 V is evaluated as active state. -
Page 14: Transferring Measured Data To Pc
G B/1 A/2 R A1 A2 COM1 COM2 / DI SMC 144 Power Analyzer l1 k1 l2 k2 l3 k3 l4 k4 Figure 8: An usage example of digital I/Os. final points of the communication line have to be fitted with terminating resistance. - Page 15 Figure 9: Download records window in program ENVIS.Daq Device Information section contains editable description and name under which the actual record is stored. Time Frame for Other Archives tab allows you to limit the date ranges of all archives by the time interval of the main archive.
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Page 16: Functional Description
SMC 144 device, was described in chapter 2. 3.2.1 Machine Status SMC 144 can be in one of three basic states indicated by green LED. Function of green LED in conjunction with 10 seconds power-up interval and fixed baud rate communication was previously described in 2.2.1. -
Page 17: Led Codes
3.2.2 LED Codes LED “PWR” (green) - device status: ˆ (off) power supply voltage is not present, measurement is stopped ˆ (slow blinking once per 2 s) normal operation, ready for connection ˆ (fast blinking once per 400 ms) device is awaiting commands in fixed baud rate (see 2.2.1) LED “A1”... -
Page 18: Evaluation Of Powers And Power Factor (Pf)
Current (RMS): where: i......sample index n......number of samples per cycle of measurement (128) ..individual samples of voltage and current 3.3.3 Evaluation of Powers and Power Factor (PF) Powers and power factors are evaluated by the following relations. The formulas apply to the star type of connection. -
Page 19: Evaluation Of Harmonic Distortion
3.3.4 Evaluation of Harmonic Distortion Using Fourier transform the instrument continuously evaluates harmonic distortion of voltages and currents up to order 63. The calculation is performed by using a rectangular window of each measurement cycle (200 ms). Following parameters are evaluated from the harmonic analysis: Fundamental (= 1 ) harmonic phase voltage: U f h... -
Page 20: Symmetrical Components
Figure 12: Identification of demand, supply and power factor profile according to the phase angle factor (IEC 60375) 3.3.5 Symmetrical components Voltage and current unbalances are evaluated on the basis of positive and negative sequence components of fundamental harmonic. Voltage unbalance: negative sequence component 100% positive sequence component... -
Page 21: Technical Specifications
Technical Specifications SMC 144 Power supply auxiliary voltage (variant U) 510 V or 80 350 V auxiliary voltage (variant L) 48 V or 20 75 V power 7 V A/3 W overvoltage category CAT III / 300 V - in compliance with IEC EN 61010-1... - Page 22 SMC 144 Instrument temperature (built-in temp. sensor) 60 ° C measuring range 3 ° C uncertainty Digital inputs (optional) high-level input voltage > 10 V low-level input voltage < 3 V maximum input voltage = 30 V input current @ input voltage...
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Page 23: Maintenance, Service, Warranty
Maintenance, Service, Warranty Maintenance The power analyzer SMC 144 does not require any maintenance during its operation. For reliable operation it is only necessary to meet the operating conditions specified and not expose the instrument to violent handling and contact with water or chemicals which could cause mechanical damage.
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