Specifications

NAIROBI OPERATIONAL HUB
UNOPS Building, UN Lane, Off UN Avenue Tel: [phone]
P.O Box 783,Village Market, 00621 E-mail: [e-mail]
Nairobi, Kenya Website: www.unops.org
UNOPS is ISO 9001 certified
Contractor to provide complete coordination / selection table prepared by the soft
starter manufacturer and indicating clearly the recommendation components such
as fuses, breakers, contractors and overload relays so as to achieve Type – 2
coordination as per IEC guidelines. These components shall be from the same
manufacturer for easy substitution and consistent operational reliability of the
equipment. Mixing of brands is wholly unacceptable. The soft starters in general
shall comply with the following.
Enclosure
- Equipment shall be manufactured in accordance with IEC regulations.
- The enclosure used shall be adequate per EMC and Low Voltage directives.
The equipment shall be CE marked.
- Units above 20A shall be fitted with adequate forced air-cooling (fan-type).
Control Circuit
The soft starter shall comprise a uP – type control arrangement (PCB based) for
triggering control and offer as a minimum, the following functions, selectable
using DIP-switch or settable using potentiometers:
- Start Ramp (settable) for upto 60 sec.
- Stop Ramp (settable) for upto 240 sec.
- Startup Voltage (settable) 10 to 60%
- Stop Voltage (settable) 10 to 60% (for Pump Stops)
- Current limit during start (settable)
- Energy saving feature (selectable) for optimal power factor, current and
efficiency levels on a real time basis, provided with activation delay
(selectable).
- Kick start function for transient high-torque condition to overcome high
initial inertia/friction loads (selectable)
- High Current Trip (selectable)
Status indications shall comprise as a minimum, LED display of the following:
- Fault (internal)
- Phase Loss
- Overload
- Ready
- Running
- Ramp-up complete
- Energy Saving function active (if selected)