DOLD Load monitoring VARIMETER

Technical Information and Features

DOLD VARIMETER PRO: The multifunctional measuring relay.

Complex processes in automation, process and industrial building systems, together with increasing demands in energy and environmental engineering require high operating reliability and permanent availability of the system. The universal measuring relays MK 9300N / MH 9300 of the VARIMETER PRO series monitor up to 9 different parameters simultaneously. Quite simply and without much wiring effort. Whether simultaneous overvoltage/undervoltage, voltage asymmetry, overcurrent/undercurrent, cos phi, active power, apparent power and reactive power, frequency and phase sequence in three-phase and singlephase networks - a measuring relay for all scenarios. Thanks to its menu structure the measuring relay can be operated easily and intuitively.

Your benefits at a glance:
- Simultaneous monitoring of up to 9 measured variables
- Overvoltage, undervoltage or window monitoring
- Simple parametrisation and fault diagnostics on the device
- Differentiated fault messages
- Large measuring range 3 AC 24 ... 690 V
- Large auxiliary voltage range DC 24 V, AC 230 V or AC/DC 110 ... 400 V
- Variable terminal configurations through plug-type screw or spring-loaded terminals
- Early detection of irregularities protects your equipment
- Timely intervention increases the availability
- Cost-effective and space-saving
- Reduced wiring effort.

Maximum output function for your application with DOLD.

Precise monitoring and diagnosis in machines and plants has gained increasing significance over the past years. The early detection of impending failures and preventive maintenance prevent costly damages. The VARIMETER PRO is the basis for reliable monitoring. As user you will benefit from the operating reliability and high availability of your system. Secure this economic advantage.

Comparison Flexibility – Price.

The right solution for each requirement: The VARIMETER PRO from DOLD is unbeatable in the price-performance ratio if several monitoring functions shall be carried out simultaneously. DOLD offers the perfect solution as well for all monofunctional measuring tasks.

DOLD VARIMETER motor load monitor MK 9397N, MH 9397 overview.

The Load monitor MK9397 and MH9397 of the varimeter family monitor reliably the load of motors as well as the function of 3 phase electrical users. If the measured value falls under or goes over the adjusted settings the corresponding output relay is energised. To avoid unnecessary tripping a response delay tv can be adjusted between 0 and 10 s. LEDs show the status of the output relays.

Your Advantage:
- Preventive maintenance
- For a evaluate time
- Quicker fault locating
- Precise and reliable
- Overload detection, as option also with prewarning
- Can also be used for underload monitoring
- Simple adjustment and fault diagnostics
- Space and cost saving

Application:
The load monitor is suitable to monitor industrial motors with variable load as well as to monitor the correct function of electrical users. The units can detect in time wearing or failures on machines and tools. So maintenance can be carried out before a plant stops.

Function:
The load monitor monitors the effective power of electrical consumers. As the current is only measured in one phase a symmetric load in a 3 phases is assumed. as it is usual with motors. The setting value is adjusted with potentiometers, the range selection by rotational switches. The MH 9397 has 2 response values (e.g. for prewarning).

DOLD Fuse Monitor IL 9075, IP 9075, SL 9075, SP 9075.

Fuse monitoring in the three-phase mains, e.g. for automatic switching-off and switch-on blockage of three-phase motors in the event of one or more phase fuses failing.

The internal resistance of the fuse monitor's measuring path is in the MOhm range, meaning that the regulations as regards touch voltage are fulfilled if a fuse is not present or if it is faulty (IEC 974-1, internal resistance > 2000 Ohm/V).

DOLD VARIMETER PRO Over- and Undervoltage Relay IL 9077, IP 9077, SL 9077, SP 9077.

All 3 phase voltages are measured with N (L1 and L2 are measured against L3 in the case of equipment without an N connection). If they are in the acceptable range, a green LED goes on and the output relay is activated. If at least one phase exceeds the setting value for overvoltage (variable between 0.9 ... 1.3 UN) or if at least one phase falls short of the setting value for undervoltage (variable between 0.7 ... 1.1 UN), the output relay releases after the set time delay and the green LED goes off (fault state). 2 red LEDs then indicate the cause of the fault:
- Undervoltage " < U"
- Overvoltage " > U"
When all 3 phase voltages are below the chosen setting value for overvoltage and above the chosen setting value for undervoltage again, the relevant red LED goes out, the output relay is activated again and the green LED goes on again (acceptable state). When the system returns to an acceptable state, there is a hysteresis of about 4 % of the set value with both the set voltage thresholds. On the unit with phase sequence detection IL/SL 9077/003 (only available without neutral) the wrong phase sequence is handled like undervoltage: The red LED ".

Applications:
Monitoring of three-phase voltage systems to identify overvoltage and undervoltage, e.g. to monitor in-house generation equipment in accordance with VDE 0100.