What is special about the MCI Compressor Starter? Can I use a “normal” MCI soft starter to soft start a compressor?
Can the MCI soft starter be used as a switch or do I need also to install a contactor?
Réponse The MCI can be used as a switch, therefore it is not necessary to use an additional contactor. The type of equipment that can be used for operational switching is specified in EN 60364-5. Included here are: contactors and semiconductor devices. It is also specified that not all conductors have to be connected. The conclusion is that a two-phase disconnection by semiconductors is sufficient to meet the requirements in relevant standards for operation of motor loads. Therefore there is no difference between a contactor breaking all three phases mechanically and a semiconductor motor controller like the MCI.
Why does the MCI soft starter only control 2 of the 3 phases?
Réponse From a technical point of view, it is not necessary to control all three phases except for bigger motors where a high starting torque is important. The un-controlled phase will “follow” the other two phases and the starting current will be reduced in all three phases. The un-controlled phase current will always be approx. 15% higher than the controlled phases.
What is a “thyristor” and what does “LTE” mean?
Réponse "thyristor is a semiconductor. In each of the controlled phases a thyristor pair is used. In a CI-tronic™ component the semiconductor is used as the mains switch with or without a ramp up/down function. Sometimes the semiconductor or thyristor is referred to as a power chip.
LTE means low thermal expansion. When a semiconductor is switched, its temperature will change rapidly. It is therefore vital that the materials used in its construction have similar coefficients of expansion to avoid mechanical stresses that could be detrimental to the semiconductor."
Why do the MCI 15 and MCI 25 not feature integrated by-pass of semiconductors?
What does “automatic detection of missing phases” mean?
What about the fact that the uncontrolled phase always is “live” on the motor terminal box?
Réponse Even with the semiconductor switched off, it is possible to measure a voltage on the motor terminals. Therefore it would not make any difference if all three phases had been switched off. The situation is the same with all solid-state controllers and frequency converters. In order to work on the motor terminals, the control device (soft starter or contactor) must be switched off anyway, for example with a circuit breaker type CTI. This is also relevant for a contactor, even though the mains are isolated
What is the control voltage?
Réponse This is the voltage used to pull in the main contactor, for instance you may be using 3 phase electricity of 415V through the main contactor to start a motor, but the voltage you use to switch the contactor to start this motor may only be 24V or even 230V, it is this which is the control voltage.
Can I buy a C 6?
Réponse "The C range of contacts has now been replaced by the CI range of contactors – typically if you have a C 6 then this can be replaced by a CI 6. This is the same for all the contactors, except for the C 10, for which we would recommend the CI 12 as a replacement.
Note: Most of the old range of contactors had built in auxiliaries, now the auxiliaries will have to be purchased separately."
Why is there a necessity for a fourth pole?
Réponse Most circuits have three phases. On some, usually smaller, systems, it is desired to break the neutral wire as well as the three “live” phases. Danfoss contactors provide this option up to and including CI 15.
What is a pole?
I need a spare part for my product. Do you have that?
Where can I find approvals and certificates for Danfoss products? E.g. do you have a PED certificate for KP7W?
Do Danfoss products comply with RoHS directive (Restriction of Hazardous Substances)?
Réponse Yes, all declarations of conformity, including RoHS and WEEE, can be found in our internet product catalogue. Look up the product of your interest and find the relevant document either under the Literature link or the Approvals & Certificates link.
How can I connect a CTI circuit breaker with a CI contactor?
I need a star-delta timer type YTI.
Do you have a soft motor starter for 100 HP?
Réponse MCI 50-3 I-O, the biggest soft starter in our CI-tronic™ range, is for a max. motor power of 40 HP if bypassed during steady state. For even higher rating, we recommend the Danfoss MCD soft starters from the VLT® Drives range.
I'm looking for a Danfoss code number and I have not found it in any catalogues?
Réponse Som code numbers are not available for all markets, or it may have been replaced by another number.
To resolve the issue, please contact your nearest Danfoss office: http://www.danfoss.com/Contact/Worldwide/
I am looking for a Danfoss product, type USC6000, but cannot find it in your catalogues?
Could I send you a Danfoss part for repair?
Can I get a CI 5, certified for marine use?
I am looking for a pump, type APP?
Do you have a contactor, type CL?
Réponse This is not a reference for the Danfoss contactors, the correct type designation is CI. To specify it, you need information like load type, voltage, and current. Please see our internet catalogue for options.
I am looking for Danfoss MASSFLO and MAGFLO flow meters?
I am looking for a Danfoss butterfly valve?
Can you deliver your products worldwide?
Réponse Yes, we have own distribution centres across the world, working together with more than 100 distributors and agents. You can see your nearest distributor or Danfoss office here: http://www.danfoss.com/Contact/Sales_and_Services/
Do you have a complete catalogue showing all your products?
Réponse Our internet product catalogue is the most extensive information source: http://www.danfoss.com/Products/Categories/
Besides these products, Danfoss also produces customer-specific products and solutions that are not visible in the catalogue. Please contact your nearest Danfoss office to discuss your needs and how we can meet them.
Can you deliver products exclusively made for us?
Réponse Yes, we have the possibility to develop products that are unique for one customer subject to individual agreements. The products may differ in appearance, technical features or packaging. Please contact us to discuss your requirements.
Which distribution channels does Danfoss use?
Can I review your stock online?
Where can I find technical drawings of Danfoss products?
Réponse Dimension and function drawings of our products are often part of the products'' technical leaflets. In our internet product catalogue (http://www.danfoss.com/Products/Categories/), find the product of your interest, then follow the Literature link to see available items.
Do you have Solid State Relays in your program?
I have mounted a Softstarter MCI C on my air compressor - why doesn't it work?
How do I select the correct soft starter?
Where do I direct commercial or technical questions?
Do you have local stock?
Where can we find your data sheets?
Réponse All relevant literature, including technical brochures, are available on our Web site: http://www.danfoss.com/BusinessAreas/IndustrialAutomation/Documentation/Industrial+Automation+Literature.htm
Do you have local websites in my language?
Is it possible to place orders online?
Can you give me some key figures on Danfoss?
Réponse If you are looking for number of employees, sales companies, turnover etc., you will find updated information here: http://www.danfoss.com/AboutUs/FactsAndFigures/
Does Danfoss operate globally?
Is Danfoss a German company?
I am looking for a hydraulic oil pump?
I am looking for a CI 4 minicontactor?
When is it recommended to use electronic contactors type ECI?
Do soft starters have any internal protection?
Réponse No, they do not have any protection. You need to use a circuit breaker before the soft starter, or use fuse and contactor with thermal relay, which ensures protection againts overloads and short-circuit.
What is maximum overload current of soft starters?
Réponse Maximum overload current for soft starters is 6xIn or 8xIn (where In is nominal current). For more details (duty ratio, number of cycles/hour, time between each start operation) please refer to overload current profile in our technical brochure.
I have a 21 kW motor application with star-delta starter, how can I change to softstarter in the cheapest way?
How can I control speed of fans with 1-phase motors?
It the contact 037H0115, type CB-DC available?
Réponse No, it is replaced by the CB-LB (037H0114), which also has a late break function (not "extra late break"). This auxiliary contact works with more voltages, not only with DC.
What is trip class?
What is the Burst Firing mode on ACI and ECI electronic contactors?
Why is our delivery delayed, when I saw that the delivery date is confirmed for 2 weeks in e-commerce?
What is the maximum starts and stops of my TCI softstarter?
Where can I find some technical information about your products?
Does a thermal overload relay provide full protection of the motor?
Réponse A thermal overload relay equipped with bimetals is a relatively small, yet reliable appliance to protect electrical motors against:
–mechanical overload,
–asymmetrical operation,
–phase failure.
To provide protection against short circuit current you should use fuses.
For full protection of the motor, we recommend CTI circuit breakers.
Which type of thermal overload relay should I choose for contactor CI 20?
What are mirror contacts and mechanically linked contacts?
Réponse These contacts provide reliable monitoring of the status of the contactor. This means that an NC auxiliary contact cannot be in closed position simultaneously with the NO main contact(s) of a contactor. We have feedback if the main contacts welds.
For more data, please see IEC Standards:
- Mechanically linked contacts in CI 5 – according to IEC 60947-5-1 Annex L,
- Mirror contact between contactor contacts CI 5 and aux. contact block CBN - according to IEC 60947-4-1 Annex F.
What are bifuctureted H-shaped contacts?
Réponse Bifuctureted, H-shaped contacts are specially designed contacts that enable switching signals down to 15V/2 mA. They are mounted in control relays CI 5-2 and in auxiliary contacts CBD. Mini contactors CI 5-5, CI 5-9, CI 5-12 have standard contacts.
How can the operation of the CI 210 EI coil be controlled?
Can Danfoss provide a 24V/50Hz coil for a CI 180 contactor?
Réponse A 24V/50Hz coil is not available as a spare part and not available as a standard code number. However, if you have a significant need for a CI 180 with 24V/50Hz coil, please contact your nearest Danfoss office.
What is the difference between MCI xx and MCI xx C families?
Why do we bypass the soft starter in steady state?
Does the MCI-CH have some protection against phase change?
What is the difference between the AC-3 and AC-4 categories?
Réponse The AC-3 category is dedicated to squirrel-cage motors; starting, disconnecting while running, whereas AC-4 is dedicated for control of squirrel motors, starting, plugging, inching.
When we perform laboratory tests AC-3 means that make current is 6 x In (nominal current), brake current is 1 x In. AC-4: make current 6 x In, brake current 6 x In.
What is the difference between the "AC-" Utilization Categories and why they are so important?
Réponse To define the conditions for which the contactors should be sized, the utilization categories have been implemented by IEC. Most common are:
- AC-1: Non inductive or slightly inductive loads.
- AC-3: Squirrel-cage motors: starting, disconnecting while running.
- AC-4: control of squirrel motors, starting, plugging, inching
- AC-15: Switching electromagnets (e.g. coils in control circuits).
The same contactor can withstand 40A for AC-1 but only 27A for AC-3 (CI 16).
When electricians talk about technical data of contactors, they usually think of AC-3, being the most "popular" utilization category.
What is the Utilization Category for contactors used for switching tubular light bulbs?
How should I interpret MCI rating index AC-53b?
How should I interpret MCI rating index AC-53a?
What does AC-53a and AC-53b stands for and what is a difference?
Can I get quality control plans/process flowcharts/material specifications/FMEA for Danfoss products?
Can you send me literature, brochures or catalogues on your products?
I placed an order through e-commerce. Could you please check the delivery dates and inform me the earliest possible delivery?
Can I download product approvals & certificate from the Danfoss websites?
Réponse Yes, in our internet product catalogue, all product approvals & certificates are listed. If you are unable to local a specific document, please e-mail or call us.
Where can I locate the ordering number on a TI 16C?