Issue: How do I prevent a Bouncing Control Switch Due to Splashing Water from Rapidly Energizing One Load and Then the Other? Solution/Resolution: In Figure A, a single Control Switch…
Did you know . . . The Macromatic Competitive Cross Reference on our website now has over 7,500 competitor Catalog Numbers with the Macromatic equivalent product? It is interactive: Enter all or…
Issue: I have purchased one of your three phase monitor relays and have connected it per the diagram on the unit. However, I cannot get the unit to operate–it just…
Issue: Your new PMPU three-phase monitor relay can work on any voltage between 190 & 500V. It also includes an adjustable under-voltage trip setting of 80-95% and a fixed overvoltage…
Issue: What is the maximum voltage that your phase monitors can handle? What about the units that offer overvoltage protection? Solution/Resolution: Use the table below to determine the maximum continuous…
Issue: Do your Phase Monitor Relays work at both 60hz as well as 50hz? What is the tolerance at either value? Solution/Resolution: All Macromatic plug-in Three-Phase Monitor Relays manufactured after…
Issue: Your new PMPU three-phase monitor relay can work on any voltage between 190 & 500V. It also includes an adjustable undervoltage trip setting of 80-95% and a fixed overvoltage…
RMS stands for Root Mean Square. True RMS is a mathematical formula that is used to calculate the effective value of an AC wave shape. To understand why this is…
The Macromatic TAA2U and TAD1U offer a wide variety of functionality and application versatility by offering START, INHIBIT and RESET inputs. The information below explains the functionality of these 3 circuits. TAA2UTAD1U START INPUT…
Issue: Can I use a phase monitor for protection on a corner grounded delta system? Answer: Yes, Macromatic phase monitor relays provide the same reliable protection on corner grounded delta…
Macromatic announces an exciting addition to its plug-in series of Three-Phase Monitor Relays. To provide solutions for a greater variety of voltage applications, four new 575V AC Three-Phase Monitor Relays…
Important questions to ask. Understanding the differences between all the functions available in time delay relays can sometimes be a daunting task. When designing circuits using time delay relays, several…
Macromatic TE-881 Series Macromatic introduced their new IEC-style modular products. The 17.5mm width is ideal for saving space in compact applications and smaller panels. These products snap-mount to a 35mm…
Issue: How many switching cycles will the contacts on your products operate with a specific load? Solution/Resolution: The electrical life of the relay is directly related to the load it…
Issue: Are there any issues with using a three-phase monitor relay on a system that is using a phase converter to get a third leg on a 240V system? Solution/Resolution:…
Overvoltage occurs when the supply voltage rises above the rated voltage of the equipment or motor. The overvoltage can cause excessive current to flow as well as creating excessive voltage…
Phase Reversal is when the phase sequence of a three-phase system is incorrect, the connected three-phase motors and other rotating equipment runs in the opposite direction. In many cases, this…
Issue: What 8 pin socket do I use with any of your plug-in Phase Monitor Relays on applications greater than 300V? According to the specifications I have seen in many…
Issue: How do I use a current transformer with one of your current sensing relays? Solution/Resolution: The Macromatic line of current sensing relays come with a variety of current ranges.…
Issue: How do I use a current transformer with one of your current sensing relays? Solution/Resolution: The Macromatic line of current sensing relays come with a variety of current ranges.…
Issue: I see most of your products have a maximum output rating of 10A @ 240V. What is the minimum contact rating of these products? Solution/Resolution: The minimum contact rating…
Issue: I would like to get a time delay relay with a fixed time delay vs. adjustable to both make it easy to set up & to avoid anyone from…
Issue: How can I set the time delay remotely, either adjustable or fixed? Solution/Resolution: There may be an application requiring the setting of the time delay "remotely" or at some…
Issue: On a time delay relay with a range of 0.3-30 seconds, how come I get less than a 0.3 second setting at the “MIN” setting and/or more than a…
Issue: I have never connected a three-phase monitor relay. Do you have a typical wiring connection? Solution/Resolution: While each individual application may have its own requirements, this diagram showing a…
Issue: I have never connected a three-phase monitor relay. Do you have a typical wiring connection? Solution/Resolution: While each individual application may have its own requirements, this diagram showing a…
We frequently receive technical support calls from installers that can't get their plug-in product to function correctly. This is understandable because unless you work with plug-in products on a regular…
Liquid Level Control Relays detect & control levels of conductive liquids such as fresh water, seawater, sewage & coffee (see table below for other liquids). They provide a low voltage signal…
Issue: Is the dial setting on your time delay relays linear? How do I find 10 seconds with a range of 1-30 seconds? Solution/Resolution: Since most time delay relays use…
Issue: I need to know how to install and connect the wiring for my seal leak probe to a Macromatic Seal Failure Relay. Solution/Resolution: Making the right connections: Seal leak…
Issue: How do you use the 70166 hold-down (tie-down) spring on the Macromatic 70169-D or 70170-D sockets when mounting the socket with two screws on a panel? What about when…
Issue: I have applied 24VDC input voltage to one of your time delay relays, but the product still doesn’t operate. I know the voltage supply is good. Solution/Resolution: Any of…
Issue: I am using one of your products that has the control switch trigger between Pins 5 & 6, and the unit is not operating. What could possibly be wrong?…
What is the difference between Directive 2002/95/EC (RoHS) and Directive 2011/65/EU (RoHS 2 or RoHS recast)? Directive 2002/95/EC was issued in 2002 by the European Commission to reduce or eliminate…
Issue: I want to use ring, fork, spade or other terminal connectors with Macromatic sockets. What sizes will work? Solution: Our 8 pin (70169-D) & 11 pin (70170-D) sockets can…
Issue: How to Apply Pilot Duty Ratings Solution/Resolution: B300, C300 PILOT DUTY RATING TABLE – AC 50 AND 60 HERTZ NEMA DesignationThermal Current [A]Maximum Current [A]Volt-Amp Rating 120V240V480V600V MakeBreakMakeBreakMakeBreakMakeBreakMakeBreak(1)B300(2)5 30 3(3)15 1.50 — — — — 3600 360C3002.5151.57.50.75————1800180 Note 1 – Code…
Issue: What are Pilot Duty Ratings and which Macromatic products have them? Solution/Resolution: A pilot duty rating is a contact rating intended for contacts that control the coil of another…
Issue: What happens if I put a jumper across the control switch terminals (Pins 5 & 6) on the TD-7 Digital-Set time delay relay, but I have the function set to…
Issue: I have a time delay relay with a trigger switch that is not connected to pins 5 & 6 as shown in your catalog. It looks like my product…
Issue: Can I use a phase monitor for protection on a high-leg delta system? Answer: Yes, Macromatic phase monitor relays provide the same reliable protection on high-leg delta systems. A…
Issue: I have noticed that most time delay relays with functions such as Repeat Cycle, Delayed Interval ON/OFF Delay have as standard the same range available for both ON OFF…
Issue: What is the difference between an "Off Delay" a "True Off Delay" time delay relay, and when is the True Off Delay function used? Solution/Resolution: Pneumatic time delay relays…
Issue: Can Macromatic's Three-Phase Monitor Relays be used with open delta systems? Answer: Yes, by following a few simple guidelines. Here is an open delta schematic: The phase monitor needs…
Issue: What is the contact resistance of your products? Solution/Resolution: See the following chart for the contact resistance values. Values are grouped by product family.
Issue: Are fuses required and what size fuse do you recommend using with your Phase Monitor Relays? Solution/Resolution: The use of fusing in-line with Macromatic phase monitor relays is not required;…
A Percentage Timer is a time delay relay commonly used in applications such as irrigation, chemical feeding, electric heating cooling, motors and lubrication systems. The Percentage Timer provides an output…
Issue: What is the difference between “UL Listed” & “UL Component Recognized”? Solution/Resolution: We are often asked several questions regarding our plug-in products & UL certifications: "Why are some products…
Issue: How is Phase Unbalance calculated and how do Phase Monitor Relays from Macromatic react to an unbalanced voltage condition? Solution: Per the National Electrical Manufacturers Association (NEMA), phase (voltage)…
Several years ago, Macromatic discontinued all non-standard configurations of the TR-6 series products, including the –T9 suffix used on the TR-61626-T9 (and other voltages as well). If you need…
ISSUE: How do I set the THL-8 Series Time Delay Relay? SOLUTION: All THL-8 Series products come with a specific single time delay range as indicated on the nameplate and by the…
Due to an upcoming component obsolescence, Macromatic has obsoleted the Compact Time Delay Relays, SS-6 and SS-8. Macromatic's TR-5 Series is an ideal replacement for the obsolete products and most are stocked at…
Issue: How do you use the Voltage Monitor Relay as an overvoltage relay? Undervoltage relay? Or Both? Solution/Resolution: Voltage Monitor Relays can be used as either overvoltage or undervoltage relays,…
Macromatic THS-1054A Series The THS-1054A series offers accurate and reliable operation as a Low Pressure Switch Bypass or “Bypass Timer”. The time delay relay operates over a wide temperature range making it…
Macromatic's TCF Series Over Temperature Seal Leakage Relays are a drop-in replacement for the PMR1 However, there are a several major advantages of the Macromatic product: Macromatic's TCF Series product…
Issue: I have an application where the panel control voltage is at 120V AC, but I need to have a 24V DC alarm circuit if the three-phase monitor relay trips.…
Bearings are one of the most important components of electric motors. Normally, they are designed to operate for many years. Yet, more than half of motor failures are caused by…
Issue #1: I have the control switches from 5 separate OFF Delay time delay relays from other manufacturers wired in parallel so one switch can operate all 5 at once.…
Macromatic's classic TR-6 Series Time Delay Relays have undergone major enhancements with an innovative design making them ideal for a variety of applications. The TR-6 Series now offers the flexibility of an…
Macromatic offers direct drop-in replacements to these Crouzet products See the chart below: Having trouble getting several products from Crouzet (Syr-Line)? Are you waiting up to 26 weeks for the Crouzet…
Issue: Can I use an Alternating Relay with one input voltage value to control multiple loads at a different voltage? Solution/Resolution: Normally, a 120V Alternating Relay is used with 120V…
Issue: I have been using a Crouzet PNR110A liquid level relay as a seal leak relay. To make it work properly, I had to jumper pins 5 6. Now, I…
Issue: The output relay appears to be already energized on my True Off Delay timer without any input voltage applied. It was that way when I received it or I…
Issue: I have two float switches and two pumps in my application: a HIGH float switch to pump the water down and prevent an overflow of the tank, and a LOW…
Issue: On any of your current sensing relays, is there a maximum voltage level for the current being monitored? Solution/Resolution: ProductsMaximum VoltageCAH, COK & CUH Encapsulated Products250VCAP Series Plug-in 500VCOKP Series Plug-in500VObsolete…
Issue: Schneider Electric (Square D) has obsoleted their complete line of 8430 MPS plug-in MPD surface-mount phase monitor relays. I see Macromatic has several products I could use to replace…
Issue: I have an old traffic signal that I would like to cycle through the Green-Yellow-Red lights. Can this be done with time delay relays? Solution/Resolution: This simple solution can…
Start Over Select Function Select a Function On Delay Interval On Off Delay Triggered On Delay Flasher (On) Flasher (Off) Watchdog One Shot Falling Edge Single Shot Cycle (On) Cycle…
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